Best head I would say afr165. Best bang for the buck would be gt-40 or gt-40p, if they will work with your exhaust. Both of these are iron not aluminum like the afr. Me if I were spending the money on heads I would splurge for the afr's, unless I found a great deal on some used gt-40's
67 Fastback,,t-5, 289 edelbrock performer heads, edelbrock f4b intake,holley 650 dp,comp cams 31-226-3, factory air and powersteering.