273 Build

Greetings guys. I have tried 91 octane with no problems. I usually put in Shell 93 octane super. I used the domed pistons because they were as close to originals as I could get. I have read a lot of positives about flat top pistons since I built mine. That's why I mentioned using them instead. I haven't talked to anyone that has built a flat top/ zero deck 273 though, just 318's. I would like to ask Egge how the compression height of their HP pistons compares with the stock HP pistons. I milled the heads some and ended up with 9.6/1 using fairly thin head gaskets. I'm sure they purposely build them with lower compression so they don't have unhappy customers.