I think the twin turbo would make too much power for a stock crank and rods...I have seen a single turbo setup run 5.66 in the 1/8th with a stock 400sbc block (aftermarket internals) didn't make too many passes and split the block in half. You could play with a single turbo for awhile if RPM's were kept down.. Just my opinion. Turbo's are the way to go as far as HP but the cost is outragous.