Hi I want a 101b for my 790 will pay shipping what ever it takes the quest for 101b has been tough specially down here in nz got onto some one on face book said he had 101b saw showed me picture removable head two dimples like chainsawguy said payed a lot over 1500 usd when it got here it was 790 alest I got 790 out off it still telling my wife it’s the 101b the greatest saw ever
You don't need a 101B, All of the 101 motors are great candidates for a good saw build.
The early 101 introduced in 1967 is the least desirable, But the 101A, 101AA, 101B, 101C,
101D and 101M/C are all great motors.