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I honestly have no idea how much hp mine would have.
More power would be great but it runs pretty good the way it is.
We've all heard Carrol Shelby's quote,
"There in never enough horsepower..... just not enough traction"
I think my 460 around 430hp & 530-540 tq. More than enough for the poor stock drivetrain.
I think this will be around 325ish/430-440 tq. Perfect for the intended use.
Geeked out on couple engine master episodes before bed last night including the cast manifolds, shorty and long tube headers again. Those LS cast manifolds are basically shorty headers though.
There was a good episode I found of speedway motors doing a test on a 604 chevy 350 circle trak motor. They ran rams horns cast iron manifolds, shorty block huggers and long tubes.
Verified I do in fact have a 400 with 4" stroke last night while throwing my weights around in the shop. Been emailing with Tmeyer, probably going to just roll with KB pistons. Read Thru @LandAndStone 's awesome 400 build thread (https://www.ford-trucks.com/forums/1...7-f100-11.html) and that spreadsheet he has made with different cam selections is amazing. Thanks again @LandAndStone
Last edited by KubotaOrange76; Feb 19, 2026 at 06:41 AM.
"IF" the RV cam, Performer intake, Holley 650 DP (I've read the Autolite 4100 4V that came on the '66 410 was 590 cfm), hedders, dual exhaust and advanced timing added 20%?, not sure if that's realistic or not, my 410 would have 396 HP and 532 lb ft tq.
-18% for 6000 ft altitude (3% for every 1000 ft) would leave me 324 HP and 436 lb ft tq.
A loss of 6 hp and 8 lb ft tq from the stock 330hp and 444 lb ft tq at sea level.
Last edited by Rubiranch; Feb 19, 2026 at 08:22 PM.
Confirmed rebuilt
Crank turned .010 under
Def was ran dry a bit, not surprised. I didn't prime it when i fired it cause honestly I didn't believe the guy that it was rebuilt.
The red rtv is about what I expected, at least he put it on oily metal. It comes off easy.
Crank is in great shape.
Last edited by KubotaOrange76; Feb 20, 2026 at 06:27 AM.
I took a close look at the heads. I don't think they have been gone thru..and someone put the newer style stem seals on it without the proper machining, so they are just loose on the stems..
I took a close look at the heads. I don't think they have been gone thru..and someone put the newer style stem seals on it without the proper machining, so they are just loose on the stems..
So heads are going to get corrected
Bubbas is ere where.
Does Eddy or trick flow make 400 heads??
Got driver side buttoned up hubs work great now.
replaced front brake lines including extended hose from frame.
pass side hose came from behind seat of my 1977 when i bought it.
went ahead and got steering box and coupler pulled.
Next is hoses and pump I've had laying around for years.
Got a little carried away and cleaned up the engine compartment some. Eliminated a few vacuum leaks and re-dialed idle mix/idle speed.
Re-curved the dizzy while in there. All in at 2500 rpm 15 initial 35* total. Needs a Vacc Advance canister, this one isnt adjustable and doesnt even start advance until about 15".
Installed new steering box, lines and fresh fluid. Bled it pretty easy. Installed new rag joint. Delayed doing rear wheel seals and brakes, fluid etc cause i needed her out of the shop. Rear brake shoes are almost new, auto adjusters need freed up as they needed good bit to get back in adjustment.
Glad I am building the 400 for this turd...knock knock knock....
Drives and runs great now, nice and tight, brakes work awesome.
Before. I used a mr gasket 925d spring in place of the heavy I had, and a bushing from an HEI kit and a little tweaking of the pin to dial her down from 32* mechanical advance to 20*. Lubed everything while in there. Still needs alot of TLC...In Due time.
You found a really nice truck for your wife.
What's coming in the shop next??
Two big mistake I made with my '79..
#1, I was pickup ignorant when I bought my new 1979. Had I known more I would have bought an F-350 instead of my F-250.
#2, selling it back in back in 2013.
Your shop is awesome!
I'd love to have a lift but I hate working under a lifted vehicle.
Back in 1974 I was working at a Texaco service station and I was under the owners car that he had set the lift to raise the car up.
It shifted while I was under it and it nearly came off and smashed me.
I've been nervous around them ever since.
