You can paint it what ever color you want, you're doing it for yourself. If you look through pictures of macs, you'll see all kinds of paint jobs from the factory, especially on the saws from the late 70's and 80's.
795 with a gear drive is an 895, you just need to find a gear box or transmission. The transmission has a chain oilier in it, so you remove the oilier from the 795 and use a stuffer plate without the pulse hole for the oilier. It uses a little different clutch, the gear drive clutch is submerged in oil and the drum has geared teeth to engage the gears in the transmission. There are two different transmissions you can use, the older one from the 1-80 through 1-86 has manual bar oilier only, the later one from 840, 890, and 895 has both manual and automatic oilier, they use a slightly different casting for the auto oilier, but, otherwise are the same.
A couple of the guys have made 797G and 125G, although, going by McCulloch's naming, they should be called 897 and 825, or maybe 8125.
795 will pull a 42" bar just fine, I've seen 8' bars on 895s.
