My 340 Score of a lifetime!

This is really a cool happening. I've always wanted to do a "what if" motor with a 340. Blueprint a stone stock 71 motor with Thermoquad, but put the 68 four speed cam in it.
RustyRatRod, that is what I did in my 69' 340 Swinger(4-speed), my 70' I kept the auto cam for my 72' van (automatic 727). Only problem I have been having is, I need a better accelerator pump for the "Stock" AVS, so I can truly use what I have. It has a leather plunger that I have tried to rejuvenate by soaking in Marvel Mystery Oil, but it only last for a short time. Any Ideas? I'm trying to stay away from the rubber ones.