Bare 428 block ?
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Senior User
Joined: Jan 2005
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From: S.C. North Dakota
Bare 428 block ?
Hi , found a bare 428 engine block . Was wondering would 390 crank
and rods work with the 428 ? The 390 crank wont have the
lenght of stroke of a 428 crank but maybe it could be made up with pistons i was thinking ,,, or not ?
I am useing a 360 block right now with the 390 crank and rods . Thanks.
and rods work with the 428 ? The 390 crank wont have the
lenght of stroke of a 428 crank but maybe it could be made up with pistons i was thinking ,,, or not ?
I am useing a 360 block right now with the 390 crank and rods . Thanks.
Posting Guru
Joined: Jul 2003
Posts: 2,232
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From: Colville, Washington
Maybe I should fill in some gaps!! The 428 block is an excellent find, they are getting harder to locate. Are you sure it is a 428? Get the casting numbers and measure the bore to make sure. The 428 crank is the key to that motor. They are available from Scat and probably a few others.
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
You can use a 390 crank and rods in a 428 block. The result is a 406. The 406 was used by Ford for racing. You may be able to get .080" oversize 390 pistons to work if the block doesn't need to be overbored. Otherwise, you'll probably need custom pistons to get good compression.
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Senior User
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From: S.C. North Dakota
I think theres markings on each crank so someone might figure that out .
WHATS SUSPICIOUS to me now is that somewhere I read that 428 blocks
have a A , C , OR G cast on the backside . So maybe someone bored this
block out to 4.13" and is passing it off as a 428 ?
I would like to try to use a 391 truck engine block but cant figure how to
get past the distributor issue . Has anyone tried to use one of these blocks?
with the smaller valves in the head ? These should have lots more torque if
speed is not as important . Or could use the regular 360 heads. ????????
WHATS SUSPICIOUS to me now is that somewhere I read that 428 blocks
have a A , C , OR G cast on the backside . So maybe someone bored this
block out to 4.13" and is passing it off as a 428 ?
I would like to try to use a 391 truck engine block but cant figure how to
get past the distributor issue . Has anyone tried to use one of these blocks?
with the smaller valves in the head ? These should have lots more torque if
speed is not as important . Or could use the regular 360 heads. ????????
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Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
There is a bushing that goes in the FT block to allow use of FE distributors. DSC sells 'em.
The FT heads will make torque, but you also have to use the matching FT intake AFAIK. Also be warned that they run out of wind at 3000rpm, they do not flow worth a ****. I'd use standard 360 heads, they flow a LOT better than FT heads. Plus, it allows use of aftermarket intakes.
The FT heads will make torque, but you also have to use the matching FT intake AFAIK. Also be warned that they run out of wind at 3000rpm, they do not flow worth a ****. I'd use standard 360 heads, they flow a LOT better than FT heads. Plus, it allows use of aftermarket intakes.
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Senior User
Joined: Jan 2005
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From: S.C. North Dakota
THANKS rusty70f100 , I could never figure the distributor issue out till
now with the bushing . So now if I can find that 391 FT engine and toss out
the FT crank and use my 390 crank ,, back to the salvage yard .
Unless I find a 428 crank .
now with the bushing . So now if I can find that 391 FT engine and toss out
the FT crank and use my 390 crank ,, back to the salvage yard .
Unless I find a 428 crank .
Post Fiend
Joined: Jan 2003
Posts: 8,600
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From: Iowa
Hey, if I were you I'd use the 391FT crank if you have one. All you need is the harmonic balancer, timing cover, pulleys, and timing set for it. You could have the snout machined down to FE dimensions, but that costs more. The 391FT crank is forged and very strong, I'd say bulletproof. Now the standard 390 crank may as well be bulletproof too, just not as much so as the forged 391FT crank.
Unless you find a 428 crank.
Unless you find a 428 crank.
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Senior User
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Posts: 422
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From: S.C. North Dakota
I had a complete 391 engine looking me in the face last summer with all the pulleys and stuff attatched . Guy at the salvage yard thought maybe the engine
had a spun bearing on the mains somewhere . Yea I could have the 391 crank turned down but more $$$ invested .
had a spun bearing on the mains somewhere . Yea I could have the 391 crank turned down but more $$$ invested .
Elder User
Joined: Sep 2003
Posts: 794
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From: Portland, OR
391 is a turd. Nodular 390 cranks are plenty strong. I've been given several 391 ft motors and all the blocks have been junk. None have had the extra main web or able to take 428 bores. Saved the cranks, rods, oil pans and tossed the rest. The D4TE truck 360/390 blocks are the most bang for my buck. Everyone I've found has the extra thick webs and will bore 4.13".
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