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My engine is being rebuilt right now. It lost oil pressure, because the builder did not secure the oil pump pickup to the oil pump via welding or a bracket. So, I am having it bored .030 over, and adding a new camshaft. The over bore will make it an actual 383 (it was a 377). Coupled with my existing cylinder heads, the engine should be just north of 500 horsepower. I know, not impressive in today's automotive world, but I am eager to see how it runs. My new engine builder has some shiny new parts in his possession to start assembly with (he picked up the block from the machine shop yesterday).
Once he gets the cylinder heads bolted on, then he can measure for the correct push rod length (we have to get them from the place that I purchased the cam, lifters, rocker arms, and rocker studs from - already paid for, but they need to know the length before they can ship them). The camshaft is a semi-custom grind that on paper does not appear to be more powerful than my existing camshaft, but it is all in the design of the lobes (the camshaft guy is very well respected on Team Chevelle - his approach to camshafts is unconventional, but his results speak for themselves).
Once he gets the cylinder heads bolted on, then he can measure for the correct push rod length (we have to get them from the place that I purchased the cam, lifters, rocker arms, and rocker studs from - already paid for, but they need to know the length before they can ship them). The camshaft is a semi-custom grind that on paper does not appear to be more powerful than my existing camshaft, but it is all in the design of the lobes (the camshaft guy is very well respected on Team Chevelle - his approach to camshafts is unconventional, but his results speak for themselves).