[Z06vette]

I'm building a 68 firebird right now & am using dynatech headers with holley pan. Those headers recommend the ATS mounts. I'm using the dirty dingo DD mounts that put the motor in stock location. Header fit was good, but I did have to grind just a bit off the side of the bellhousing on pass side, and put a small notch in the driver side motor mount. My pan was just barely touching the crossmember in one spot, but i did not use the ATS mounts. Probably a non issue if I had. 228R is a decent cam. I thinks its great for the street & keeps some low speed driveability. I personally wouldnt go much bigger just for driveability. If you can live with the low speed issues of a big cam, then you could step it up. I'm running 228/232 on a 112 in my 69 camaro, and we had to work on the idle/driveability/surging issues a few times before we got the tune where i was happy with it. I drive it a lot so i wanted no issues. For gearing, I had 3.73 for a while, then went to 4.10's- it really keeps the motor right in the powerband now. Scott