So, I'm about to install my engine and ****** - Chevy 350 / Saginaw 4spd. Lets ***ume HP to be 350-400. I have already installed solid motor and ****** mounts. I made these mounts myself and had a mid-plate installed between the engine and trans during the build. The mid-plate is .090 thick. The mid-plate came with a spacer (also .090 thick) that goes between the crank and the flywheel. Maybe I don't need solid mounts, maybe I don't need a mid-plate, but the question I have is.....Do I need to use that spacer? I don't want to use it. It seems to me that being only .090 thick isn't gonna change things enough to require it's use. The clutch disc would ride .090 closer to the front tip of the trans input shaft, but I can't see that being a problem. The throwout bearing would have to go in an additional .090, but again, I can't see a problem with that. I guess I think the further the flywheel is "away" from the crank(spacer installed), the more likely some type of vibration or worse yet, failure could result. I have purchased a "longer than stock" pilot bushing. I also have purchased ARP flywheel bolts and ARP pressure plate bolts, if that matters or not. So guys, what should I do? Anybody not run the spacer?
All my dragsters had motor plates, I haven't ever needed a crank spacer, maybe Ive just been lucky, I'd say put it together and see how it feels, if it doesn't feel right take it apart and put the spacer in, Tim Jones
The Jalopy Journal
