Well, I had my engine rebuilt. Runs great. Sounds the same as before. My Butt can not feel any difference yet. But, I have been gentle with it. This was all done by Mitch @ Mustang Fever and Clark's Auto & Machine shop in Cupertino. It's funny. Living in the Bay Area I thought finding a good machine shop would be easy. Nope. They either don't do complete rebuilds or they were just complete A$$holes. Specs: Vintage Inlines (Classic Inlines) Aluminum Head (switched over from the OZ250 head) Rebuilt the same block. Bored 0.060 over 9.6:1 Compression Squared the deck. 17-10 thousandths Tempo 2.3 Flat top pistons (yes, they fit) Felpro Head Gasket Everything Balanced. New Rods, bearings, oil pump, dual roller timing chain, etc ... (2 of the old Rods were stamped 4) 1.6 adjustable rockers (custom from RAU) 3/8 Push Rods (from Smith Bros., stock was 5/16) Recurved DSii /MSD 6A. Thanks Bill Ambler !! Gano Filter Same Holley 350 carb. (for now, already have an FiTech ready to install) Schneider 264-74H cam 110 lobe (switched from a 260-70) Clifford single out headers/Flowmaster Dual Out Muffler (old setup from before) PowerMaster Mini-starter New Motor Mounts I still have to reorganize the wiring/hoses. After 500 miles of break in. I will change the oil and install the FiTech.