I have a 511 stroker in my 69 Bee. It's a blast to drive, instant power. Just be careful driving a stroker on the street. Its hard to keep it hooked. The first day I drove mine on the street I almost lost it the first time I jumped on it from standing start, when I hit second under full power it went sideways. Now I get it rolling first then jump on it. On the track with DOT slicks it hooks good and runs 11.7. Not bad for a full interior , AC, PS, PB equipped 4,000 pound car. I say go for the big inches, you won't be sorry.