87 deville ac help

hello 87 cadilliac deville just purchased i think its a 4.7 v8? anyways the ac is bad on it. replaced high pressure switch,compressor,fuses etc. Just wont work. can the system be swapped for a newer 90's caddy ac system or something of that nature. im sensative to heat so ac is a must for me. any ideas or help would be really great. my mechanic is a older fella and just has no idea what to do at this point.

Not sure what you mean by "swapping" systems. Probably not gonna happen, best to find out what is wrong with the system you have.

Seems like you have the perfect scenario-- old car and old mechanic-- he should feel right at home with that 25 yr old car!

Have you reset the possible a/c trouble code yet? Unhook battery for 10 seconds and try again..