Quote:

---

AS others have pointed out, don't go to big on the cam. When I rebuilt (re-ringed) my 383 a couple of years back, I put in the 509 because I wanted that prostock idle and I wanted to kill a little torque for the street (4spd, less wheel spin). It was fun romping around with that choppy idle but the power band dosn't kick in untill around 3000rpms.
My build is:
-.040 383 w/factory style flat tops & slighty decked. 9.10 calculated compression.
-516 heads, 2.14-1.81 valves, bowls ported and blended & straightened out exhaust ports. cced @ 72cc. Shim gaskets
-Holly SD w/800dp I know it's too big but all I had available and some old school Jardine headers.

The car has a 4spd and 3.91 gears so it makes the cam livable on the street. I'm either going to change the cam to a 528 solid or swap the gears to 4.30-4.56 for some extra zip in the street light grand prix.

---

I'd swap in the .528 first .

sorry for all the posts , I was out of town over the weekend and had limited computer access ...