I was certainly surprised when the head swap corrected the oil consumption on the 355, with the high oil use I thought it would be a combination of rings/bore/heads. You may find it is just the heads.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy