Page 10 of 11
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: December 19, 2025, 5:05 pm
by theastronaut
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: December 19, 2025, 5:07 pm
by theastronaut
I'd been seeing posts and videos about using splines/long spreaders to spread filler over large areas to the correct shape to cut down on sanding, along with using Rage Xtra mixed into Rage Ultra to extend work time so you'd have time to use a large spreader to get the filler on and shaped before it set up. I made a few in different sizes using 1/4" lexan, the longest was doubled to increase rigidity so it would hold a very consistent slight curve over the entire length. The shorter one is abut 30", and the shortest is about 16" and narrower to let it curve easier. I'll grab more pics and include them in the next update.
I was able to get the upper back of the cab in shape with only three skims, with very little blocking needed to get it super straight. The shot with the c-channel shows just how straight the filler is even without being sanded yet.
There was a bit of a learning curve, but once I started getting the hang of it I got the back of the cab shaped up pretty trouble free. There is very little wasted filler since you have a lot of work time- any excess from the area you're working can be applied to another low area and spread to shape before it sets up.
To get the ribs shaped up, I milled 3/8" lexan to match the 45* angles.
Spreader trimmed to the correct shape, with a little allowance for applying enough to block.
Guide taped in place to keep the spreader straight, and results of skimming/blocking.
The tips got their own cut to shape spreader, and a guide to keep the height of each matching and level.
The body line had a few irregular areas so I built those up and blocked it to the correct shape. I taped over most of the block to keep 3/4th of it from cutting, and used it to get the built up area 95% flat without digging into what I'd already blocked around it.
The upper part of the body line was blocked with a durablock wrapped in 150, with 90% of the face masked off so only about 1/8" of the edge was exposed. This made it easy to bring down the line until it was dead straight all the way across, and left a perfect 1/4 round radius.
Starting the roof skims using the middle length spreader. All three sectioins of the roof had a very slight flat spot in the middle, and the spreader was able to perfectly bridge across the low and create the correct overall shape using the to sides as a guide.
Once all of the lows were identifided and skimmed individually, I did a very light overall skim to fill an any pinholes/spreader marks.
Prepped and shot with epoxy.
Blocking the epoxy to show any missed spots. I blocked the center, then along the entire outer rear ~1.5" with a long 3/8" block to create a constant light line before the inner section dipped lower, masked that area, then transitioned in the center dip to the tape line.
1/8" thick half width block for more flexibility.
1/4" half width block for less flexibility.

Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: December 19, 2025, 5:08 pm
by theastronaut
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: December 19, 2025, 7:02 pm
by FarmMotorSports
Impressive as ever!
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: December 23, 2025, 8:17 pm
by chris401
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: December 27, 2025, 9:34 pm
by grump
I'm going to have to check in more often after seeing what I've been missing here. Still doing great work I see, always nice to see someone doing work at this level of craftmanship.
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: January 28, 2026, 9:36 am
by theastronaut
grump wrote: ↑December 27, 2025, 9:34 pm
I'm going to have to check in more often after seeing what I've been missing here. Still doing great work I see, always nice to see someone doing work at this level of craftmanship.
Thanks guys!
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: January 28, 2026, 9:37 am
by theastronaut
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: January 28, 2026, 9:38 am
by theastronaut
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: February 4, 2026, 9:17 pm
by grump
Dang, looking good. It looks like you have picked up some tools to make things a little easier and better. Do you think the owners will put miles on the truck? Keep up the fine work.
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: February 11, 2026, 11:15 am
by chris401
Yeah, they make the 65 radiator support, 66 grille and the first 65 design accelerator cable. Go figure. I even sent DC the better 66 cable that doesn't hang up on the fire wall but nothing became of it.
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: February 26, 2026, 9:30 am
by theastronaut
grump wrote: ↑February 4, 2026, 9:17 pm
Dang, looking good. It looks like you have picked up some tools to make things a little easier and better. Do you think the owners will put miles on the truck? Keep up the fine work.
Thanks! He's planning on driving it.
chris401 wrote: ↑February 11, 2026, 11:15 am
Yeah, they make the 65 radiator support, 66 grille and the first 65 design accelerator cable. Go figure. I even sent DC the better 66 cable that doesn't hang up on the fire wall but nothing became of it.
I noticed that the bumper filler panel isn't made correctly for a '66 either, the grill mounts are in different locations.
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: February 26, 2026, 9:30 am
by theastronaut
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: February 26, 2026, 10:37 am
by theastronaut
Starting point of the front bumper/filler panel fitment. The corners and outer flanges of the splash panel were so far off that I just cut those off completely to get them out of the way. The rad support, fenders, and filler panels are all aftermarket and nothing matched up. The mounting flanges on the filler panel were supposed to be vertical but were angled around 15* on each side on the new panel, so the outer mounting flanges also had to be cut off just to get the filler panel to fit in place. The bumper stuck out too far past the detail line on the filler panel, and the whole thing stuck out way too far from the body.
I double checked the rad support/filler panel fit with the original filler panel to determine which part was shaped wrong; neither fit correctly so the rad support isn't shaped correctly.
The rad support had metric threads so I drilled them to the next standard size up and retapped the threads.
The bumper normally mounts directly to the frame with no ability to adjust it, but we asked No Limit to make shorter frame stubs with bolt on bumper brackets so the bumper could be moved around easier. The holes they drilled didn't offer any adjustment, so I cut the whole rear edge off to make room for moving the bumper back farther, welded up what was left of the holes, and drilled/slotted new ones once I had the bumper where I wanted it.
Filler panel mount brackets removed from the original panel, blasted, and straightened to fit the fenders and rad support better.
To fit the bumper closer to the body, I split the filler panel down the middle and initially overlapped it to do a test fit to see how far in I wanted to bring the bumper in, and settled on taking out 1".

Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: February 26, 2026, 10:55 am
by theastronaut
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: March 17, 2026, 11:28 am
by Mr. Jones
What are you using to post pictures? I’ve been away for a couple years and have forgotten….
Thanks
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: March 17, 2026, 6:37 pm
by FarmMotorSports
Imgur, image hosting I believe.
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: March 17, 2026, 6:38 pm
by FarmMotorSports
Imgur, image hosting I believe. The process I would have to experiment with... But, who would notice?
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: March 30, 2026, 10:55 am
by theastronaut
Mr. Jones wrote: ↑March 17, 2026, 11:28 am
What are you using to post pictures? I’ve been away for a couple years and have forgotten….
Thanks
I've been using Imgur but they've started to block hosting on busier forums.
Re: 1966 F100 Short Bed Styleside Metal/Body/Paint Work
Posted: March 30, 2026, 7:25 pm
by FarmMotorSports
Then we shouldn't have a problem here it's not busy!