45 minutes is impressive, it took me 10 minutes just to remove the electrical connector for the injectors and another 15 minutes fighting with the axle hub, u use a good deal of air tools? chop shop style id say give me 45 minutes no problem, just cutting everything off but i always end up with stuck on hoses and problems finding my tools once i misplace them, then again i do drink alot of beer while working so that may be a hindering factor im not figuring in there. good job, doing this last engine the zc i probably spent a good 8-9 hours on it taking my time, and cleaning up everything while i was doing it, but i hopped in my empty car and scrubbed down the sides, degreased the new engine and had to drive back in to town to get a new 32 mm socket after i broke mine on the hub.