well after 3 weeks of installation and 2 days of tinkering on timing/carb etc. the engine is officially installed in my 71 blazer!, man ill tell you she rips too, 454 bored .060 over with a Comp cams 268H, Edelbrock 750 cfm carb, hedman hedders, holley street dominator intake, Balanced, optima battery, K&N, centerforce dual friction, Keith Black pistons. I think thats it but boy i can tell you she sounds mean on just open headers, till i can get it to the exhaust shop next week! sorry to make the thread so long but im just happy to have the old girl running after sitting for 4 years. Theres No Replacement for Cubic Inches!