I'm looking into dropping a ZC into my 91 Si w/221K on it. Camshaft seal is leaking and afterweighing out the cost of everything, might as well just drop a newer motor and trans in it. I was just wondering about the ZC, I know it's a direct drop in and such and it's got around 130.. but whats better? Single or Dual overhead cams in a ZC, and where can i get replacement parts such as a timing belt for it (or what will fit, since i work at a parts store)?

also... whats the quickest way to replace the blower motor and all the heating/AC **** that could have possibly jammed up so that I have no heat or AC and no air blowing. I'm gambling on the blower motor since the same thing happened in my S10 and it was the blower motor.

Thanks!