36/37 front cylinder needed

[dixchief]

These have the 2 earlobe fins on the exhaust port. Richard dixchief@gmail.com 407-417-4882

[fillibuster]

These have the 2 earlobe fins on the exhaust port. Richard dixchief@gmail.com 407-417-4882

you haven't said whether scout or chief.

[Knotthed]

I'm betting chief based on his screenname.