[b-man]

With all that said you might get off with less cash outlay if you’re able to source a pair of good ‘65 -‘67 326 heads or ‘65 -‘66 high compression 389 heads with guide slots in pristine condition. Then have a simple valve job done and use them as is with the original press in studs and a mild factory cam (066) that’s less stressful on the press in studs.

Good machine work along with new valves and guides is the best way to insure longevity and protect against break downs. However a pair of used 326 heads that were not abused or high mileage might be an option, as long as they’re local to you and cheap to free.

Several years back I gave away a nice clean pair of 1967 #140 heads that came off of a good running 326. They were nice enough to be used after a quick cleaning, the guy who gave them to me unnecessarily took apart a complete 326 that he yanked to install a new 455, I had no use for them and rather than store them I gave them away.