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I picked up a set of "J code" heads from a 68 Cougar 302-4V, casting number C80E-F. Should I keep them and use them with a performer RPM, and Comp XE256 with a 600 cfm Performer carb, or sell them on Ebay and buy a set of Windsor Jr.s to use with the same intake and carb, and a Xe262 cam?

This is for my 64 Fairlane 500 4 door, C-4 Cruise-o-matic and 3.00 gears, 5-bolt 289. Most likely I will use 289 HiPo manifolds, and dual exhaust.

Remember, I am just looking for a nice snappy street car that will likely never see the track.

<font size=-1>[ This Message was edited by: truedog on 4/17/06 10:08pm ]</font>
 

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J heads are just plain small chamber heads .I have measured the ports with 289,302 2V and 351w and the ports are small, nothing special except the small chamber and 302w valves.I would go aftermarket after selling the J heads to a restorer and make sure you get at least a 58cc or smaller aftermarket head.If you want cheap the J heads would port ok to suit a mild build but also they are unleaded etc etc$$$ to rebuild when you would be better going new if going for long term performance.
 

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yes, all early 289,302 ford heads had the same size ports. 4v,2v made no differance. chamber size was the only differance. And the hi po heads were nothing but factory screw in studs, slotted pushrod holes, and cupped valve spring pockets. No differance in performance.
IN my opinon your choking the manifold, cam and carb unless you at least have the heads mildly ported on the exhaust side, and mild ported in the valve bowls
 
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