Update on this saga that has stretched over several years . I did use a 272 Husky coil which works very well ,nice not spark .These things are pretty torquey but at 99 cc's they should be . I don't think they have the grunt of a 2100 husky though .
As I might have mentioned if you use Husqvarna 2100 bar plates a Husky bar will fit .If you are lucky enough to find the actual McCulloch 1000 bar plates a Mac 10 series will fit but you have to use a gasket to block the oil from going in one hole straight through because of the way a 10 series bar is made .Oils through the same hole as the tightener goes into on the reverse (top ) side .
From what I see on these things the main difference between the Partner P-100 Super and the Mac 1000 is a handle brace on the former to prevent breaking the rear handle should it get dropped .Everthing thing else is identical,carb,cylinder etc .
It's been a real challenge resurrecting these two .More so than any other saw I've worked on including sleeving a Mac 125 with a cast iron cylinder liner .