I have 2 engines, 'big' engine is a .070 over 383 stroker with a 3.685 offset ground crank, stock 360 main journal, 2" rod journal with 6" small block chevy rods. The 'small' engine is a .030 over 360 with stock stroke. Both have W2 econo heads that have had some porting work done on them, nothing extensive. The 'big' engine has a comp cams roller .654 intake, .655 exhaust. 'Small' engine has a MP 590 cam. My best 1/4 ET with the 'big' engine is a 10.05. I haven't run the 'small' engine in my Dart yet, but in a similarly built, but all steel Duster (except for the hood, and a Holley 750DP vice the 1050 Dominator on the 'big' engine) it would run 10.20s all day. Big difference between the two, not really, at least in my set up. I still have the feeling that the car should be running better with the 'big' engine, that something is holding it back, but I haven't been able to determine what it may be.
