Heads: 1G 6 Bolt vs. 1G 7 Bolt

[john]

I would rebuild yours also. I believe Nash's 7 bolt head is off his old 2g. Even a 2g head can be bolted up without any time consuming work. All you have to do is drill the head to 1/2" and pull the seal out of the end of the intake cam. A 1g thermostat housing even bolts up to a 2g head but not vice versa.