You really only have two choices on the aluminum blocks since Genesis is not making any right nnow and I would stay away from them anyway. Either the Pond or Shelby will handle a lot of HP. I would say that they will both handle at least 1500 and probably more. The Pond is only available in the 4.250 bore and it can go up to a 4.310 bore if needed. Shelby has a big bore option on their blocks for 500 extra. It starts at 4.375 bore size and you can go bigger from there. The Shelby block is about 800.00 dollars more than the Pond when you figure in the extra cost of the Shelby head studs.
You did not say how much HP you want to make or what you plan on doing with the engine. The power you want to make will be affected by the compression you want to run,the money you want to spend on an engine and how you plan on using it. We can help you with about anything you want to do with an FE engine. There are a few other guys in the country that can help you as well. Be careful who you deal with on an FE engine build because they are a little different. Thanks, Keith Craft
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