newbie M3 question - sunroofs

Am searching for a 95 M3 to purchase. Did BMW send any non-sunroof models to the US that year? All the ones that I've seen for sale on various sites have a sunroof. I'd also like to know if a 3.0 or 3.2 will easily swap into a 318 body. Would I need to upgrade the gearbox, firewall or mounting points. How difficult would this be to do monitarily speeking aside from the cost of the motor? Just researching all options for my next project.

P.S. Im selling my 2000 S4, aprox. 360 hp. If interested just drop me a line for more details.

Get 96 M3....first year of the 3.2 L engine. Next big engine change was with the addition of the euro spect E46 M3 motor with individual throttle butterflies making huge horse numbers