Hey Paul,

What are your objectives with the car, exhibition passes, competing in the N/FC groups, just making hits for fun, etc. I suspect with that old of a chassis, you're doing it more for the love of doing it, which is the way the movement started out, unfortunately its turned into a lot more than that (read: $$$$$ and more $$$$)anda 6.00 car is almost not competitive anymore. There are some groups that have come up with some general guidelines to keep the cars and costs in check (Great Lakes Funny Cars comes to mind) and put on some decent match race shows. The Funny Car Reunion at Englishtown would be a good place to go, usually in July each year, to get to know some of the folks that are still doing it for the love of it.
As far as power plant, keep in mind what parts are still somewhat available that would have been run back in the late 60's. You also need to determine what your chassis may have originally been built for. Say you decided on a late Hemi, you need to check and see if the uprights and diagonal on the left side were designed to clear the late model oil pump, and if you want to try to run an onboard starter. Little things like that are not insurmountable but can be a pain in the tail. Early model Hemi has "way cool" all over it but seems like the F/C guys gravitated to the late model more and there were suprisingly a lot of big-block Chebbies in the early F/C's. As far as bodies, there are several good builders making really decent and much lighter replica's that have been pulled off of molds of earlier bodies. There is a button on the Classic Funny Car site of body builders, most all usually between $2800-3500, which considering the work involved is not unreasonable.