depends which ones.. i run '65 or was it '66 289 heads? i don't remember but they are 289 heads... on one of my cars think it was like C5AE or something like that.... gotta look at old picture i have.. me no remember these days... but the problem only 52cc. biggest valve you can put in it is a 1.94 / 1.60.. some say 1.90 and 1.54 combo... maybe someones come up with a better way since then to get a bigger vavle but not that i know of. if its the only heads you got well i don't see why not.. IMO any right out of the box head will run circles around it!
Thanks MM, Still playing around with ideas.Just thought the 289 heads would up the compression. Just wasn't sure what the compromise would be. Darrel
I have a set of C5AE (1965) 289 heads...They have1.94 /1.60 valves and were profesionally ported on the exaust ports , the Intake ports were gasket matched to a fel-pro gasket. The 302 they were on had 12.8 to 1 compression (running TRW L2249nf pistons. With a torqer intake,holley 750dp,Comp cams solid flat tappet cam 578/570 lift,255/266 dur @ .050 106 ls. The engine went 11.47 @ 114 mph in a 2830 lb. car with 29 inch tires and 5.13 gears with a c-4 running a 4,800 rpm converter...consistantly
I ran a set of 66 heads at one time. Before aftermarket heads were around. They were okay, but choices today are FAR better. Knowing what I know now, if I did it over, I would have used early W heads back then. My 289s were milled, enlarged to 1.94/1.60, and set up for a good valvetrain. I can say they were tough, had good compression, and ran well enough... The drawbacks by today's standards are the iron composition, and small ports. Dave
I ran (and still have for sale) the heads MAV ran. I was able to get into the low 12's with bad rear gearing. I liked them, just got a killer deal on aluminum RPMs.
Factory 289 heads They MAY increase your compression over some 302 heads due to tighter chambers. Are they stock? 1.94/1.6 valves can be added. Without porting, all the speed work/parts in the world won't allow you to get max HP due to small ports. Ports are where gas/air come in and exhaust gets out. Seth
