Re: 351C budget rebuild...
I am pretty sure with a s/c you can only run one fuel not dual. Due to the s/c piping having to go on top of the carb. You'd more than likely have to run straight gas.
PM Workhorse for a decent budget 351C build. His goes well and it strong as nails. The only difference would be the cam selection as 4Vs require different cam characteristics to 2V's.
I personally wouldn't consider a s/c'd engine within the realm of budget builds. I've been quoted $10,000 to s/c mine. Bugger that!
XB Fairmont (street car) email@example.com.