I have been looking at this topic for a while and it seems to me that some people are cunfusing the 500hp limit on stock blocks. It seems to me that the limit may be in the 500rwhp not 500flywheelhp. If you lose 20 to 25% hp through your drive train, 500rwhp is in the 650-675 flywheel hp range which is very serious hp. Somthing else I have been thinking about is the link between splitting blocks and solid motor mount,I understand that you have to keep the motor from moving(rotating) but the solid mounts are prob contributing to the problem. Are you running solid mounts or do you have a motor plate of some kind?

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64GALAXIE 347 STROKER [EMAIL="12.65@107mph"]12.65@107mph[/EMAIL][SIGPIC][/SIGPIC]