you guys are a wealth of info !
i'm picking up parts now to upgrade a scarab s type.
i have a chance to pick up front and rear plates
it's a TRS 72c set up, and i'm wondering about losing that 1/4 inch between the trans and coupler,
what else am i missing here

any advice is appreciated

thanks

I measured mine and agonized over what to do about this issue a few months back. I've done some custom stuff where I ended up milling the bellhousing down to make the trans input spline line up perfectly with the flywheel plate splines, but this time I was using Merc bellhousing coolers, and there was just nowhere to go, not enough meat to machine anywhere. I came to the conclusion that the length of the spline insert in the drive plate is shorter than the splines on the transmission pilot shaft, and I'm getting just about 90% engagement. I figured that if Huber says you can put 1450 lb-ft of torque to the tranmission, then it will take my 1000 lb-ft as long as I've got at least 68% engagement.

good point, thank you

Why not just use the factory trs tailstock mounts?