MM chassis swap

Hey Folks, I got a 01' MM chassis over Christmas for $50 from a reputable sled parting operation. After I have independently verified its a good chassis ( I trust these guys, but never can be too safe)I would like to swap my good parts into this good chassis. I currently have a 99' vintage sled with a damaged tunnel. I'm wondering what I would need to swap these. I know I would obviously need a longer track, but from a limited amount of research I've done most everything else should transfer over directly, including the skid. I plan on upgrading the drive shaft and going to anti ratchet drivers, as well as going beyond the 141" track, probably between 144-low 150" challenger. I also plan on building some trailing arms similar to the ones MPI has to offer. Has anybody else done something like this? What did you find? Thanks for any info you guys have, Brian

I will be switching everything over from the 99 so I'm not going to need to change out the stator. Basically it'll be a 99 in a 01 chassis with a longer track. I'm more concerned about the skid I suppose, If I put the 99 skid in would I just measure the outer diameter of the drives to the rear axle and upper supports and get a good length? Thanks for the responses guys, It'll be a good help for my project next summer.

Sorry I meant track length, I'm going to pull the measurements for the skid mounting off another sled using center to center on all critical measurements.