300 crank in a 215 question

That is true.
Nic and I both have the newer Rover crossbolted blocks.
By the time you had all of the machining done to fit a 4.6 in a 215 or Rover 3.9 block it wouldnt be very cost effective compared to using the Buick 300 crank.
I was just trying to get around the 1/2 overhang of using the 300 crank.

 

Hoffbug, half overhang? What does it mean?

 

Im still learning about these engines but this is what I have learned..


The Buick 300 crank is .56" longer on the tail side than the stock 215 crank, This puts the ring gear out of reach of the starter. There are a couple of solutions.

Phil Baker uses a 64 Ford C4 flexplate with an adapter mounted to it then a Buick 300/340 flexplate with the ring gear removed is mounted onto that..



D&D fabrications uses a modified Buick 300 flexplate. The stock 166 tooth ring gear is removed, then the flexplate diameter is machined smaller to fit a Buick 215 155 tooth ring gear.
Im not sure how the offset is handled but I believe there is some sort of spacer used.
They do make their own custom flywheel for this swap.
That is what I believe Nic has since he will be running a manual transmission.

 

Yes that's what I'm using. It's not cheap but it's a good solution for the 300 crank.

 

Thanks for the answer. For some reason I wasnt thinking about the rear end of the crank, but its effect upon the top end. My error. Nic or someone else talked about some of the issues at the crank flange earlier.

I picked up the Chevy 250 valve springs yesterday, so should have some numbers in a day or two. Wouldnt it be surprising if springs from a Chev 6 were to work?

 

And, that flywheel is made by Trans-Dapt for D&D.

 

Indeed. It's pretty fun to build an engine out of parts from a bunch of engines! LOL! So much for brand loyalty.