Thanks to all that responded. I opened the float chamber and discovered the jets were 65H. I decided that going lower would not enhance performance (from other 600cfm discussions on posted topics) , so i up the jet size to 69. After installing, Man, what a noticable difference, this car really rips. Transistion into second gear is significantly stronger (like someone added 50cids)and pulles alot harder into third gear.
This 4160 has a secondary plate that is labled 134-39??? what do the numbers mean?What is the plate, and is it a good thing?