I only have a few things to get finished before I hit the lake, my driveline is the big problem. when I bought this boat with a 455 it had a flywheel, the motor I built for it came from a car with a flexplate, I figured I would just swap the two and put the flywheel on this motor but had a thread about it and some said that might not be a good idea due to the balancing not being correct, so for breakin I left the driveline out, but now I need it to go to the lake. with the flexplate on, there is 1/4" of the crankshaft sticking out past the plate, my driveline is just a flat flange that originally bolted flush with the flywheel. would it be ok for me to make a 1/4" spacer to bolt between the two? if so should I use steel or would aluminum work ok? and what should I use for bolts, would black oxide work good? at the most it may have about 450hp and 600ish lbs of torque, but probably not even that much.I may put a light shot of nitrous at it if all goes well.
thanks for the help, I would like to have it on the water this weekend.