Going to take a crack at Index racing next year

dusterbing the peace said
Starting in second will build quite a bit of heat, leaning hard on the converter. Okay with the gap in early rounds, but when you start getting closer together in the later rounds you’ll struggle to cool down. Restrictor plates or smaller carb to chop your top end, and maybe dropping some timing will kill quite a bit of top end, and still have good response to wamp the stripe. Will the 7.0 class allow throttle stop/electronics?

Since I'm running EFI it would be a pain to swap to a carb for index 1 week, then back to EFI the next, then back to carb, etc. Intake is too tall for a 1" restrictor plate. The plates are allowed but no electronics. I haven't been able to find any bolt type throttle stop for the 4500 size Throttle body.