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Message: <blockquote data-quote="Paul" data-source="post: 209365" data-attributes="member: 9404">Do it - more cubic inches is always better than less. Yould could also consider even larger strokers. (i.e. 408 and 418)No. The block will split when it wants to split. I would ensure you have an excellent tune if you plan to push 650 rwhp. Windsors have HUGE main journals on their crankshaft, ergo they have very heavy crankshafts. When a 302 splits, it cracks up the front of the block and down the valley. When a Windsor gives up, it can shoot the crankshaft out the bottom along with your main caps.Those heads and intake are WAAAY too small for that combination. You should be looking toward a set of ported TFS TW, AFR 205s, or similar at a minimum. If you put 302 heads/intake on a 393, you make 302 power.Ensure you have the appropriate injectors for whatever power level you wish to push, and use an appropriate BSFC when calculating injector size. (naturally aspirated vs boosted)42# injectors can support a lot of power, and 60s can support enough to break the block.Paul.</blockquote>