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. We need to wait and see how much more money the OP wants to throw at this engine... if any...
 

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To the original poster:

What well meaning hotrodders, and to some degree, most magazines often do is ignore the relationship of the camshaft as the heart and soul of your engine as a system. Your base engine is somewhere in the neighborhood of 58yrs old. And most of the "literature" supplied by the cam companies advertising department is just about useless. Can you really advertise a cam for 262 cubic inches to 400 cubic inches, using measurements that are not standardized and are often "rated" by their performance in a singular application (350 cubic inches)?

Its VERY easy to "over cam" an engine. Id say 90% of the people here are guilty of that to some extent, and most of us are over cammed and over carbureted technically. And we like it that way TYVM.

Your situation is complicated further by the fact that most 283 pistons that are commonly available for a "reasonable" price are altered dimensionally. These are "Rebuilder" pistons and have been designed for an engine block that has been machined on the cylinder head mating surface. Grinding material off this surface (called the "deck"), shortens the distance between the top of the piston and the cylinder head. This is not a bad thing, in fact we often do it to increase performance. However; if you have an engine block that hasn't been "decked", and your pistons are designed for it, you get really bad compression. and its very hard to fix properly. You should disassemble the engine, and have the block decked, or install the proper pistons with the current deck height. And a 283 is not a budget build at that point (250HP and you've incurred a lot of time and money).

Install a milder camshaft with new valvesprings and hydraulic lifters. Save your money for a 350 smallblock build down the road. Thats a much easier way to add 100hp to your equation. Its also an easier build for a new guy to handle, and its much cheaper in the long run.
 
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