I bought a 92 Mustang GT vert last year in Texas the car is from MI and FL. I was told it was a 30 over 302. I runs fine for a basic stocker but runs alil to good. Full smog and egr car. While taking car down for a few upgrades I found SUGA stamped on the heads. Anyone know of an engine builder using that stamp?? Any help would be great thanks Gix