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I'm sure the block would hold up but the parts to make 900 hp would punish your wallet."Hot Rod" mag claims a bone stock 460 block can make upwards of 900 horsepower. OH momma
For what you're building, the stock cast iron lump is closest, the Stealth might be a little too big and hurt low end. There's a reason why the Street Master is no longer produced, it worked pretty good in the mid range but a Performer works better down low and at least as good through the mid range, a Performer RPM/Stealth style dual plane works better from the mid range on up.Pics of intakes;
Edelbrock Streetmaster single plane lowrise
Weiand Stealth dual plane hirider
Stock 1968 dual plane lowrise
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You are correct, the stock carbed intake will not bolt onto a later engine with EFI heads. Or any 460 with EFI heads. But then you have this adapter.I have a 460 EFI in my RV. I had the motor out several years ago and looked at if I could use the heads on a carbed motor. I can't really remember why, but I decided it wouldnt work. Iirc the intakes wont switch between carb and EFI.
Never too late to join the party.So I’m probably chiming in a little late, but…
My dad had an 89 F-350 dump with a 460 and an identical 94 F-350 with the 460. Both were EFI (I know, you are working with carb but hear me out). The 89 had an oil consumption problem from day 1. At 30k Ford rebuilt the engine. I never drove it until after the rebuild but it always had a bit of a lumpy idle and it would run circles around the 94. Like it would easily start out in third gear empty or under a half ton of load and start easily in second with a ton or so on. I also accidentally discovered it would light up the LS dually s if you let the clutch fly in first. A friendly chat with someone we knew at Ford seemed to indicate that in the late 80’s Ford experimented with putting RV cams and such in the 1-ton and larger trucks. So, an RV cam or something might be a worth investment.
The 94, which I now own, needs some work and I’ve been kicking around doing some tweaks to make it run more like the 89 did or better.
I hear that, I keep getting delayed on getting the dump truck going, but as soon as I can get my green Ranger back up and going, I NEED to get the dump done. It got parked because the valve guides are shot. My intent, at present, is to throw a cam in it, new valve guides, maybe some light gasket match port work and headers. I want to fix the problem, wake it up a little, but not do a full rebuild or blow it up by doing too much without a full rebuild.Never too late to join the party.
I'm focusing on getting it running now so I can move it around.
I do think an RV style cam will be a good fit.
Engine build will likely be the last item on this list as long as I can get it to run and move.
For what it's worth, I think that that's a great plan, if the motor checks out as still healthy.If compression checks out, this build becomes a lot simpler.
The way it ran last night I'm hopeful that it will all be ok. The spark plugs I pulled and checked had no business running, but they ran. With new ignition parts it will run even better.
I am thinking the list now becomes a straight up timing set (maybe a new cam), new intake manifold, possibly a new carb, and recurve of the distributor.
I believe that will do everything I want it to and give me a good running, long lasting engine.