Thread: 396 build up and 12's possible?

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I probably more than likely put it in a camaro, my heads still have stock 2.06in
1.72ex, i hearing 2.19/188 will hurt me, because the smaller bore shrouds that big valve, i was thinking maybe boring to 4.250 to make 427cubes though it could be waste of money, my bores are at 4.155 whick makes 408 cubes. The heads have lot of bowl work to them, there is a good possibility that my heads will flow very well, hoping 300 cfm, i will probably flow out my heads this coming week. pat, what kind of desktop dyno do you have? I have the program Dyno SE and i put my info in, with the same specs above, with dual plane, 750 holley, smaller tube headers, solid cam, the program is thinking, 495hp at 5700RPM and 510ft torque, which to me seems quite a bit excessive, but if any of you guys have dyno simulation program, you try it out with the specs at the top