Thanks for the pic unlce, that helps a lot. I got most of the parts in today and will probably get to it either sunday or monday. It looks like the tiger drive matches up for the Infinit engine...I'm not sure about the backing plate, but it looks like you use the same backing plate and just replace the pull start mechanism (although I haven't officially checked the Sullivan websight for exact direction), but the bearing fits and the cap screws line up, and it came with new cap screws to put in the backing plate so the heads clear the unit. Just the crank shaft is only about 1/2-3/4 into the one way bearing.
Dad, I have been getting a little confused in our exchange on this exhaust issue myself. The opening in manifold is much larger than the one in the block. The opening in the manifold is exposed under the flange where it mounts to the block. I believe the gasket had covered that, but since I hadn't gotten gasket material when I did it, I tried covering it with the form-a-gasket, but I might have filled it into the manifold cavity a little, or didn't put enough on and have a leak. I'm going to replace the head screws with button head cap screws (allen bolts) for better tightening also.
Thank you guys all so much for your helpfulness and patience...I think I understand enough now to do the job right and will take more time...I rushed it last time, and didn't have all the right supplies and tried to make do.
One more question though...I know you guys gave a part number for the traxxas clutch springs, but I haven't been able to find anyplace to carry just traxxas clutch springs, only whole slices. I ordered MIP T-Maxx replacement springs. They also came in today and are about 1/4 inch longer just like the Hot bodies ones I had used. Is that 6164x (or whatever # it was, don't have time to look at the moment) for the 2.5 in the Maxx, or is it for an older model. These MIP's although are the same length as the Hot bodies, are thinner, being the same diameter as the stock Infinities. Is this supposed to be right, or am I making too many assumptions?