1Trk,
Just to give you a basis for comparison, here are my specs.
I have those heads in stageII configuration on an iron SO of 427 ci. We have the same trans and rear gears. The cam is solid and spec's; .613/.633 - 244/255 @.050 with 110deg. LDA. I have TWO 600's, [modified to 654 each] on a tunnel wedge. Timing is 14/24, in by 2500, vac is 7-8 inches @ 1000RPM. Like you, I have the ERA headers and stainless pipes.
You have 2.25" valves you're trying to feed with only 600 CFM. Plenty of velocity but no volume which is why it stumbles below 2500. You can probably benefit from a 950 at least, with those heads in stock form, have good driveability and a much better top than you feel now.
IMHO, keep the aggressive cam and add induction. You have a very deep breathing combo. A smaller cam will waste those high-flowing heads. You'll need less initial and then you can curve the advance correctly. I have freight-train power from 3500 to 7000, but it still drives nicely without fuss off idle. "Scary fast" is an accurate description as it's an 11 second set-up.
Best luck, and P.S. - Try to find out the CR from the Shelby guys. 10 or 10 1/2 would be good with the cam. Mike LeFevers was there when I bought my heads but is on his own now.
P.P.S. Your car's a beautiful color and best of luck. Mine is 20 yrs. old.
Now that's a Cam
Linear Mode
