Distributor problems??

[BrandonW730]

i have an 87 N/A supra that had a blown head gasket and a warped head. After taking it apart i ordered a refurbished head for it for a 7mge supra, arp bolts, and a new gasket. when i got the head is said 7mgte on it so i figured they are the same head. anyway i assembled most of the engine, but now i am stuck on the distributor/cps. The tsrm said there was a mark on the drivin gear but mine has a drilled hole that i assume is supposed to line up with the mark on the housing, is this correct?? I can get the cps in up to the oring but it wont go in any further, i tried to force it in by tightening the holding bolt but after doing this i heard a loud snap and now the drivin gear has a lot of friction when its turning, so i think i need a new distributor. Is the distributor not goin in because it is not compatible with the head? or is it because it is a new head and needs to be worked in?