6.5 vs sb chevy

[Twisted Steel Performance]

Question...

Anyone know if a 6.5 rear crank bolt pattern is the same as a sb or bb chevy as far as the flywheel bolt pattern ?

Reason I'm asking is my machine shop has a engine dyno on the way and I will need a coupler that fits my crank, I'm just trying to gather parts and be somewhat ready later this summer, if I need to have a coupler made I would like to get it started..

 

[ak diesel driver]

I seem to remember someone getting a flexplate for a 396 gas and it bolted up.

 

[Twisted Steel Performance]

Thanks Les, after some searching Chevy gas use 2 different crank bolt patterns and center hole diameter , I think I'll be good so I'll just wait till the dyno gets here and check...

 

[dbrannon79]

not that it helps any, but I did find out that the bell housing pattern is the same for the sb chevy. maybe if someone has an old shim plate from a 350 or 305 that gets bolted on (I think thats what it's called) and a loose crank or engine. see if the holes line up.