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IIBAD4U · 05-23-1999, 10:45 AM

I have access to a set of 64 289 heads, 66 289 heads, and a set of 70 351 heads. What would be the best set to use to get the compression up on a 302 with stock 77 heads? I thought the 351 heads would be a little better because of the larger valves, and they still have a small combustion chamber (anywhere from 56 to 61 cc) but would the ports be too large? The 302 and 289 heads use 1.04x1.94 intake ports and the 351 heads have 1.76x1.94 intake ports (WxH).

Thanks,
IIBAD4U

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1977 Mustang II, 306/C4

05-23-1999, 10:45 AM	#1
IIBAD4U Registered Member Join Date: Jan 1999 Location: Bismarck ND USA Posts: 8	Head games I have access to a set of 64 289 heads, 66 289 heads, and a set of 70 351 heads. What would be the best set to use to get the compression up on a 302 with stock 77 heads? I thought the 351 heads would be a little better because of the larger valves, and they still have a small combustion chamber (anywhere from 56 to 61 cc) but would the ports be too large? The 302 and 289 heads use 1.04x1.94 intake ports and the 351 heads have 1.76x1.94 intake ports (WxH). Thanks, IIBAD4U ------------------ 1977 Mustang II, 306/C4