Hi, I have no car to compare but my 70 challenger, 383 with 220/226 @0.050 cam, 440 heads, KB400 pistons (domes), DP4B, HP manifolds, stock 727, stock clutch fan, holley SA 770, MP performance distributor and orange box, msd blaster coil (mounted in front of carb) + 0.25ohm ballast; has nice power and torque when engine is quite cold.
During first 10 minutes after firing up runs like a raped ape, melting F70-14 in 2nd gear... but when engine is warm it runs noticeably weaker. No signs of any malfunctions but it is not as strong as during the first 10 minutes. When it is hot outside - 90 F and above it seems car loses 20% of power.
Compression is 150-160 and even. I have no O2 sensor to check AFR but no hesitation, no stumble, no bogging while drive be it cruise, be it WOT.
Timing is 20 initial and 36 total. Vac 17 in N @800, 15 in D @700rpm.
I changed the jets to 71 front and 74 rear assuming the carb is too big but this made no difference.