hey guys 3 ?s

[shoman1997]

i got a 302 block today that is supposed to be 30 over but i took heads off and pistons say 40 on top of them is it 40 over ?? second question is wat does fly cut pistons look like can some one post a pic of them ??? if it is 40 over wat does that make it a 309 ???

[shoman1997]

ne of you guys help me with this

[evil666stang]

if there 40 over it should say 0.040. i dont have any pictures but a fly cut piston in my understanding is where they cut valve reliefs into the dome for lower compresion, so the valves dont hit the top of the piston. my dads 347 has the pistons flycut

[facemelter71]

http://img.villagephotos.com/p/2008-1/1296889/flycut.jpg
Fly cut piston^^and it sounds like you have the speed pro pistons that are 40 over.

[shoman1997]

yeah the only difference with my pistons is that they have the notches on both sides total of 4 per piston not just the two and found out that the 40 over makes it a 308