I would go with a Turbo 350, it's pretty much a straight forward swap. Only issue would be the shifter, there is a conversion kit available to make it compatable with the 350-400 trannies. You can use your old driveshaft & crossmember with the T-350. Put a shift kit in it to firm up the shifts and it will hold up to anything that 350 2 BBL can throw at it!
