I gave up on factory starters, HD or not decades ago. They are nothing but a HUGE heat sink and being direct drive more windings still doesn't give them any better leverage. Headers coming close to any of them quickly send them to an early grave. Then you have folks running a lot more initial advance with many of these engines making them even harder to turn over fully warmed up and heat soaked.
Gear ruduction is the way to go with these things and the aftermarket makes some really nice units. A tad expensive but one of the things in this hobby that is well worth the additional cost........IMHO.....
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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),
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