Factory 340's humiliated so many cars. If you know, High Performance can not be hidden. I worked at a Rental Car company in FL while I was in college. One of my friends was a Chevy guy, so I told him to buy a white 72 Nova when it's time came to be sold. I could hear it had a "Corvette" 350 in it rather than the junk 350s most Chevies had. There is a lot in the combination, not just a couple parts. If it is fast and you can't afford to drive it, or it stinks driving it around town it won't matter how fast it could be.