Hi,I have mondello manual that tells me what plugs to run.Problem is it's a 2004 manual and all the plugs listed are not made any more.They hand me another plug that replaces the one not made any more but nobody really seams to know any thing.I tried Champions and it ran worse I just picked up a set of AC's that I think are wrong,there 5/8 and don't have a gasket just a tapper The clerk argued with me that there's no difference between a 350 Oldsmobile and a 350 chevy there the same engine!Can any one tell me what plugs I need for a 74 350/350th
HEI dis.
flat top pistons
10-1 compression
670 Holley 4 barrel
#8 heads with 2in.valves
Thanks railguy

 

Delco R45S