The 326 thru 455 Pontiac engine has the same external dimensions. You should be able to swap your original A/C brackets from the original engine to the 455. It won't take any body mods at all.
It would be R134a.
R134 _ Well Mine did
Equipment found in the cutting room of a clothing factory
The factory tires and rims from a 2001 Pontiac grand am cannot work properly on a 2003 Pontiac grand am.
A laser cutting factory
The Pontiac Montana does not come with a factory installed amp in the sound system. The wiring goes directly from the radio to the speakers.
P225/60R16 is the proper factory tire size.
There is no AC, you have to go to the factory.
All MGB's that have air conditioning had units installed as dealer-installed options. So, no MGB's came from the factory with A/C.
Rims and tires from a 2001 Pontiac Grand Am will fit on a 2003 Pontiac Grand Am. They have the same lug nut pattern.
Yes, it came with one.
No, from the factory Asters were all four cylinders.