Hey all I'm new to the forum. I have some 65 model C4AE heads which have some pretty big valves 194/160 I think, & dual valve springs. Are they port friendly? The #'s on the bottom say C4AE I think. The # 65 along with the # 289 is also cast onto the heads so I was guessing they are 1965 model 289 heads. I want to get them ported but need some input. Thanks for any advice.