Wow as it turns out I was wrong
flywheels are the same from small block to big block Chevy. Yet one more reason I love Chevys!!! The best thing is that I have found that the internal balance flywheels can be used with the external balanced 400 sb and 454 bb by the use of this balance plate
http://www.jegs.com/i/Fidanza/383/624541/10002/-1 cheap to
looks as if I am in business once again!!!!
BTW the part number I got from the article that jgtti posted for the starter also checks out!!!
