Im new to the classic car game but i feel in love with it and i dont ever want to go back.....Anyways I want to change my R12 to R134.....How do i go about doing that???? cause i want to do it myself... do i jus change the nozzle or is there alot more to it??.........and 1 more question i have a 400 turbo tranny with a 1500 to 1800 stall converter and i want to change the cams without changing or messing with the tranny......any suggestions????

 

2 separate questions. Let me explain each as well as I can.

First, is the a/c currently working? If so leave it alone. If not, you need to fix the leak, from what I've understood all you NEED to do is change the fill valves and fill with r134a and correct oil. BUT! There are 2 134 oils pag and ester. I'm pretty sure you use ester, but have that confirmed, if you use the wrong one it can do damage to the compressor and all the aluminum a/c parts...

Next, for the cam change... What motor do you have? 350, 455? What's done to it? Stock? Rebuilt?
Cam changes are nearly worthless without the compression to make it work right.
As for the th400 trans, it will take what you throw at it for the most part. You may want a shift kit for firmer, more "defined", shifts. Also, converter stall speed makes a big difference in the way the car reacts to the cam. If you want to stay 15-1800 stall you are pretty much stuck near stock. Also, rear gear ratio plays a role in this too.

And now for the more experience to fill you in on the details.

 

im pretty sure the ac works i just need to recharge it......as for the tranny i do hav a b&m shift kit and yea the motor is an olds 350 rocket that stock.....and about the rear gears do u hav any suggestions or do ya think i should keep it stock

 

if your wanting more check to see whats in there first, then if small I would at at least go to a 3.43 or close to it.......the shift kit will help define your shifts more but maybe step up to a higher stahll I have a 355 and had a 2800 stall and was very very happy with that selction with 3.43 gears ONLY a one wheel wonder but still was alot of fun