The importance of measuring bell housing runout.

I do think it's important. When I finally start the T5 swap on Vixen, I will measure the runout since I am using a transmission adapter from Gill Welding.

Having said that, I wonder what the factory tolerances were? Not listed tolerances somewhere on paper, but ACTUAL MEASURED tolerances? I mean, if their actual deck heights and combustion chamber sizes were any indication, I'd say those tolerances were pretty wide.

Again, I'm not arguing against doing it right. I just wonder. Did the factory measure runout on every bellhousing that left the factory? Of course not. I guess what I'm saying is, there has to be a pretty wide tolerance there, or else we'd have seen lots of damaged parts from the factory. I don't think there's any way they were all the same or even within the same range when they left the factory.

At least that's my opinion. lol