[Malcolm Towrie]

It looks like the valve under the plug hole is the exhaust valve so it makes sense that that valve is more likely to stick.

Have you had it apart since? If so, did you find the valve springs weak or varnish build-up on the stems?

And after taking another look, Lynn's right. Those heads are not coming off without removing that angle iron rail, so my thought of simply pulling heads and intake off to do a quick fix isn't going to fly. And from what I have heard and read, doing valve work on this engine isn't that simple anyway.

Malcolm