I have a spare core support that I'm about to chop up and drop the lower edge 3 inches. That will allow me to ditch the body lift pucks in the front and allow me to run a bigger rad for the v8 sitting on my stand.

First question is does anybody know of a site that lists rad measurements. I'm looking for one 31 1/4 wide (can cut and fit one up to 36 1/4) my limit is 18 inches tall. I want a factory rad due to ease of getting a replacement at any parts store vs a custom one.

2nd question is can I upgrade the condenser. The factory one is 27 wide and 14 tall. As long as I'm modding the core if it helps the ac I might as well upgrade that. The v8 has a sanden compresor designed for r134a. The 87 blazer system was designed for r12. I'm far from an ac expert but I know r134a doesn't cool as well as r12. Is there a difference in the condensers like the 134a have more fins per inch compared to r12 systems? I've looked at measurements and even vans have about the same size as a blazer. If there isn't any major differences I might as well keep the one I have.

Oh and the blazer has been converted to 134a already, was working when parked, and dang near all new parts in the engine bay.

 

im not so sure about that comment of r12 working better then 134a i converted my 1st gen to 134a and it will freeze you out of the cab on a 90 degree day. i didnt add anything or change compresser just used a conversion kit with 3 cans of 134a and 1 can of some synthetic 134a said to cool better

 

My 91 with factory r12 still in it gets way colder than the r134a swap ever did in the blazer.

I've done swaps on my 78 nova, 69 gmc, and a few s10s r134a does not get as cold as the r12 in a system designed for r12. Now a system designed to run r134a it works great. Our first gens were not designed for it however.