Me and my dad have had a 65 fastback for about 7 years now. Its been completly restored except for the engine. We are now working on rebuilding the engine. So last weeked we had taked the engine out and started taking it apart. We noticed that the cylinder heads didnt look the same. We checked the part #s and found that the drivers side head was a 65 hipo and the passengers side is a normal 66! They have differnt valve sizes. I'm not sure if the compression is different. The guy who owned it before us seems like he was trying to make a hipo out of a c-code 289. He put in a manual joke, 4 barrel carb, and maybe he lost the other hipo head so he just stuck on a 66. He said he rebuilt the engine before we bought it. He did a poor job. There are mismatched bolts, and bolts without washers where there should be. There are all kinds of things that are wrong with this. We we're originally going to have this longblock rebuild and returned but now we'll probobly just do an exchange

 

Just either get a new hipo head or a just a new set of stock 65 heads, that is if you're making your car a resto-stock. If you don't care about keeping it stock, just get whatever heads will fit for the least amount of money.

PS It's manual choke, not joke

ToNy