OK I have a 66 Chevy 283 engine. Last owner added Edelbrock Performance Plus Cam with Duration 278/ 288, Lift .420/ .442.
EdelBrock Performer RPM Cylinder heads - Aluminum, 70cc Chamber, 170cc Intake, roller rockers,
MSD 6200 ignition control, Edelbrock Performer dual plane intake manifold, and
Edelbrock Performer Carb @ 600cfm.

I have adjusted the timing several times
between 6-10 degrees advance. The thing runs fine but has no real punch on the low end. I couldn't smoke the tires unless I popped the clutch at 4000
rpm.

Short of replacing this with a 350 (yes I have budget constraints), got any ideas on getting a better response on the low end?

Do you think the static compression is too low on this thing?