Tear it up, fix it, repeat

The heads are ready to go up. The valve springs look useable. I always buy extra valve guides, because I always seem to use more than four. ...

Got this for a buck. It will look sweet on my Trail 90 in a bike show.

Here's the crankcase bore before the big bore work. I measured it to 3.685 inches just for reference to compare to the big bore diameter...

Here's the front head and it's leaking spark plug insert and it had a previous exhaust stud repair, of course. Here's it the aft...

If I was going to build a stroker, I definately needed to do something about these sad old heads. The rear was in the worst shape. Here'...