I know. The 430 or 455 would kick its butt. Believe me. I speak from experience. Don't just take my word for it, search around on the net. Here's food for thought. Tha big block Buicks are the lightest big blocks ever made. They are about the same weight as your chebbie. When you see a full bodied 67 GS430 run low 11s on all motor, you become a believer. Think about it from a logistics standpoint. How cool would it be to open the hood with everybody expectin to see chebbie power and all of a sudden be arguin that somebody put a ford motor in it cause the distributor is in the front. lol I've witnessed that very thing. Plus, you'd be goin faster. Faster and more cool points. If that car was mine, that chebbie would be a doorstop.