I got it free but still not a smart move on men guess I thought of changing but was told I would not see much gain? I am certainly up to change if some of you feel I will see some gains . Just so we know it's a stock rebuild and used all arp bolts every where I could. Got block , internals and 12 heads free. Had the Pistons dished out to get cr to 9.4.block is a 69 bored 30 over. Head were 72 cc. The dyno number were run on 89 octane gas.It running a stock auto 400 trans with I think a stock 13 in torque converter. It is in my 1968 GTO convertible with factory air, power brakes ,front disk and power widows. There are a few more options but none that effect much. Car came complete and running from Southern California with 72 motor I still have for 6000 dollars no rust . Has and open rear end with 2.94 gears which I could change so fire away I'm all for the best I can get . May never see strip but might once in a while and want to just have a nice cruiser. Builder did a great job and only did what I ask him to.