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Thanks you guys alot also where could I find the flexplate to crankshaft bolts and are there 7 of them?Yup, TBI heads are a direct bolt on, use the TBI distributor, and all the TBI front accessories.
As stated earlier, the flex plate has to be from the '84.
The "up to '85" blocks used a 2 piece rear main seal, so the crankshaft and flex plate are different.
1 piece rear main seal in 86, 72° canted intake bolts and center bolt valve covers in '87.
So if you're '84 below the China rails, use '84 parts. '87+ above uses the OE '94 parts.
Also, there should be no difference in the head gaskets, but I'd go with the '84.
The only problem you're gonna face is the driver side oil dipstick. It's not gonna fit behind the exhaust manifold. Use shorty headers to solve that problem. Ask me how I know...