what sets of heads require piston notching??

88 5ohh · 12-09-2004

Just wondering... i know AFR's require piston notching, or aftermarket pistons (i think?) but what others need it??
I just need to know what heads i can think about purchasing with stock pistons in an 88... Im mainly interested cause im planning to get one of those engine kits that are advertised at several places. Trickflow, for example, offer their twisted wedge heads, stage 2 cam, chromoly pushrods, rockers, and street intake for a very decent price. Say it will take a stock 5.0 with a 75mm TB and 190lph pump to 340hp/360ft.
So i think thats the next best thing from going blown...
Thanks all.

tmoss · 12-09-2004

Twisted Wedge heads require that the notches on the pistons be in a slightly different location than a stock piston due to the "twisted" position of the valve. AFR heads that have intake valves smaller than the 2.02" size will normally work with stock pistons if the cam lift and duration are coordinated.