It's close. The -1 is a square port head and the -2 is an oval port head.
Why oh why Indy thinks a 1.625 exhaust valve on those heads is a good thing. It's just plain stupid.
I was going to buy some -1's about 8 or so years ago but I couldn't get them to sell me a set of heads with the valves unfinished. That big exhaust valve is crazy. It should be no bigger that 1.550 if the port isn't junk.
And if the port is junk, then the big valve won't fix that.
