i was in the hunt for a big block a few years ago so i answered an add on craigslist and came across a late 1963 426 max wedge with the 6 bolt heads wasnt sure what i had actually purshased untill i got it home and decoded everything yuuup i scored big only paid $350 with the engine stand that it was on ...my plans are to install it into my 70 swinger with a sure grip mini tube and a four speed what do you guys thunk i need to do to the 426 to run mid / hi tens in the 1/4