Big Block gurus please help
 

I have an 87 with factory 454 with TBi, rod in knocking... My buddy has a MV gen 3 block and I am wondering if I can just swap blocks or are there difffs that would be a pain
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Re: Big Block gurus please help
 

i wish i had the answer for you but if you dont recieve a response on this I will move to engines in the AM tomorrow

Re: Big Block gurus please help
 

If your question is will the bare blocks interchange the answer is no;
You can however change out the whole motor.
If you just want a block they are the same from 1970 to 1990(Mark 4 motors)so there are lots around.
The mark 5 went to 1 pc crank seal(different flex plate) and different cylinder heads

Weak areas on high mileage engines are pistons,camshafts and lifters

Re: Big Block gurus please help
 

Thanks bud, I found a 78 454 so working with that now
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Re: Big Block gurus please help
 

Are you positive its a rod knock? I had a 454 truck that suddenly developed a knock. Sounded like a rod but oil pressure was fine .I ran a little top engine cleaner through it and cleaned the combustion chambers out . Knock gone . It was a piece of carbon that had apparently attached to a piston and was smacking the head. Just a thought . There are cheaper ways to clean carbon from the chambers but this one worked.
Frank