Salvaging a 428 crank - possible use in a 427 block?

[fairlaniac]

I’m picking up a 428 crank from a fellow FE enthusiast. It has had an issue and in his words “The rod ate the back of the journal and cut .057 off the back”. If this winds up being a candidate for offset grinding and using GM style 6.700 rods, it looks like on a CAD layout that the stroke might be at 4.125? Are pistons for a 4.260 bore (my block) available for such a combo?

Thank you!
Doug

[Barry_R]

Diamond will make anything you ask for.
This one is just a "bore size change" on a catalog part.

[jayb]

Doug, just by the numbers (FE rod journal 2.4388", BBC rod journal 2.200"), the maximum potential stroke would be 4.2188".  Should be no problem to offset grind the crank for the 4.125" stroke, but you might consider the cost of the offset grinding and look at a Scat crank; might be close to the same cost as getting your crank repaired and offset ground.  I don't know if the BBC rod width would be a problem with the stock 428 crank.

Since the Scat cranks are available with a 4.125" stroke I assume pistons would be available...

[blykins]

Turning the journal down to BBC isn't the issue....the biggest part of it is making the journal wider for the BBC rod.  That's where most of the effort/expense goes.

Pistons are the easy part...

As Barry mentioned, Diamond will do it with just an engineering change, and so will Racetec.

[fairlaniac]

Thanks guys. The crank is free to me so there is zero initial costs.