Topic: 76-550 + 77 550 interchangeability

[Surly]

I have a 77 550 and I have aline on a 76 550F parts bike. My question is if I buy the parts bike are the engine parts compatible?
For instance can I port the head on the 76 550F head and then in the winter do a top end job and slap it on the 77 550K?
Thanks gang, this forum has been indispensible.
Surly

[TwoTired]

For instance can I port the head on the 76 550F head and then in the winter do a top end job and slap it on the 77 550K?

yes

[Chris Liston]

The motors are all the same.  its little things, like seats and tanks that present the issues.

[Surly]

Thanks guys, I'm picking up the 550 on Sat.