I finished putting a big block in my car and now the transmission in second is slipping (2004r). When I bought the car the tv cable was off and I am thinking was something to do with the bad trans. My question is for a big block just fun to drive car (lower budget) am I better off building a junkyard 2004r to put back in or swapping to a turbo 400. The big block is a mild cam with intake/headers. I have a 2500 stall convertor in it now but can buy a 400 convertor or even just put a stock one on.