- Feb 6, 2002
- 68,502 convt. ,- &81,4speed ,80 4 speed, 70 454
i have a 74 350 ,motor work has been done . block was milled and heads.compression don,t know what it is but has to be over 8.5 to 1 it pings if timing is at 8 that s where it says to set it.if you set it a t 4 it want run right . would a colder plug help or a hotter plug help? which one? additive 104 didn't help.