Here I have a set of rebuilt 1968 302 J-Code heads. These are correct for a 1968 J-Code Mustang and Shelby GT350. They are the best 302 heads from 1968 due to the smaller chamber (53.5cc). The exhaust has been ported. The intake side is stock. These castings are almost identical to the 1965-67 289 HiPo heads in regards to the ports and valves so they should flow 165-169cfm on the intake side and give a nice bump in power due to the ported exhaust. The heads have been milled .015. This will knock the chamber size down about 2cc but they will work without milling your manifold. These have been machined for screw in rocker studs and come with 3/8" studs and 5/16" guide plates. They also come with Comp Cams valve springs. A build sheet is included from Aldridge Motorsports in Oregon that has all the valve spring specs.
You can use these heads on your J-Code/GT350 restoration or pop them onto your 289 and have better-than-HiPo heads for much less. You'll be able to keep (or even bump up slightly) your 289's compression ratio unlike all the heads out there that come with 58cc-65cc combustion chambers that are abysmal for compression on a 289. I was going to use these on my 289 C-Code but decided to build an aluminum headed stroker instead.
I paid $599 for them plus shipping which was about $70. I'd like to get the same back out of them if possible. Thanks.