If the engine responds well to more timing at idle and you end up that high I'd bring it in with Vacuum Advance vs base timing and shortening up the timing curve as too much initial can cause difficult hot restarts.
I wouldn't worry much about APT or lean tip-in testing at the moment. Nail down the timing and fuel settings to get the engine happy at idle speed where you have no nozzle drip, and good sensitivity from the idle mixture screws.
APT adjustments are best made by driving the vehicle and making very small changes to nail down the best power, efficiency and fuel economy in the "normal" driving range......
__________________
If you can read this, thank a teacher. If you can read this in English, thank a Veteran!
https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
|