I just went through this Jan-Feb of 2004.
As others here have indicated, the process is both difficult, yet attainable. 100% Compliance, as has been noted, is the standard.
In particular, I had problems with engine/tranny receipts and ground clearance.
Receipts for the engine and tranny MUST include the VIN of the donor cars. The engine must definitely have the last 8 chars of the VIN stamped on it somewhere. The tranny they might let you slide on as long as they have the donor vin and that car had that type of transmission as an available option.
Ground clearance must be at least 4". I raised my Venom 427's adjustable suspension to the max, inflated my tires to 60 psi, and I still was way short.
I ended up changing the fox body dual sump
oil pan to a canton racing "T" style one, and got the clearance resolved.
**** IMPORTANT ****
If the car is registered in New Jersey, MAINTAIN THAT REGI! That way, he can drive the car in, and as long as they dont declare it unroadworthy, he wont have to flatbed it, even if it requires a reinspection!!!!
The inspectors are "good guys" trying to do their jobs. They dont "want you to fail". If you have a good attitude, they will assist you in any reasonable way. I found them to be courteous, professional, and reasonable.