Budget 12A SP build

[t_g_farrell]

I think I should explain the goals of this build. I call it a budget build because I
don't want to sink a lot of money into my 1st rebuild. This is a learning exercise
for me and if it works well when I'm done great. If it blows up in a year,
no biggie. Normally, if I was doing a full rebuild like this it would be with near
perfect parts and all new hard and soft seals and springs. My next rebuild
(see I know there will be another) will be of much higher quality.

The other thing going on with this is that the engine its replacing in my SA,
I will be keeping for another project. The current ignition, intake and exhaust
can all be reused with this rebuild. Just some small jetting changes for the
Dellorto. If the engines blows, I can just swap the stock port back in. I like
doing it like this because it will keep a lot of unknowns out of the equation while
I try to get my rebuild started and running the first time. Baby steps. Gotta
walk before you run.