If I run my 10.5:1 iron head 340 at more than 32 degrees, all in, on pump 91 fuel it pings bad on acceleration.
I run a pro billet MSD distributor with out vacuum advance.
I think some of u guys are confusing cruising , with all out acceleration timing , which is set at 34 on mine , the 50 max is limiting at cruising not much load /gas mileage.---------- I think I said that right .
I know in my own mind what I mean -----------_LOL
