Hi, just wondering if a 396 crank and a 427 have the same journal sizes? If so could I put the 396 crank in a 427 block? Would I need different size pushrods? if so, What size? thanks, Eric

396 and a 427 use the same crank..

The journal sizes and stroke of the 396 and 427 cranks are the same, so it will fit right in. A true 427 crank has additional bulk to the counterweights to offset the heavier 427 pistons. A 396 crank can be rebalanced to work with 427 pistons. Any crank you put in should be rebalanced anyway.

thanks, me and my friend were arguing over it, but would I need different length pushrods?

Originally posted by chev65elleSS:
thanks, me and my friend were arguing over it, but would I need different length pushrods? =

I will assume you meant connecting rods??
396, 427, 454 are all the same length in stock form. 6.135"
There are some differences between the rods in weight & bolt size for different applications & some debatable issues with strength on a few but they can all be interchanged as long as you are going to rebalance the engine.

If you meant pushrods the intakes are one length & exhaust are about an inch longer.
There has been 5/16", 3/8" & 7/16" used in different applications over the years but they are all the same basic length.

Doohhhh graemlins/clonk.gif I meant connecting rod

Isn't a 396 crank in a 454 block what makes a 427ci? If so, then that's just like putting a 350 crank into a 327 block, just to make it a 350....meaning it's interchangable.

^^^^Yep.

To be more technically accurate, the 396 and 427 have the same stroke. The 427 and 454 have the same bore. TECHNICALLY, the 396 and 427 have cranks that are the same stroke and for all intents they are interchangable with some balancing work, but they are NOT exactly the same in their raw form. As I mentioned above the 427 crank has additional counterweight material to compensate for the heavier 427 rod/piston assemblies.