52 AD...you might want to go back and check your numbers on the 86 Camaro T5 box. The 4.03 1st gear is most often found in an S10 T5 box. None of the numbers you listed jibe with any of the numbers in my book with the exception of the 1.00 4th gear.
To identify a t5 correctly, you need to get the numbers of the little tag on the drivers side of the case. The numbers cast into the case are not going to identify the transmission. Some of the later models also have a bar code that can be deciphered.
I'm currently running a 3.42 R&P with an 85 S10 T5 w/.72 5th gear. I tried a 3.08 and as Wrenchbender pointed out, it will eliminate being able to use 5th gear entirely. The 235 is going to be happiest (highest vacuum at constant speed) at 1900-2200 rpms. With my setup I cruise at 70 mph at 2000 rpms and I'm still a couple hundred rpms from optimizing my engine efficiency so I'm looking at a 3.73.
It's not going to do you any good to calculate if you haven't locked in on which OD ratio you have. A .86 OD t5 might be fine in 5th but most of them have the 4.03 1st gear which is going to have you shifting out of first at a very low speed.
If you don't have a tag on the transmission to identify the specific year and OD ratio send me a PM and I can show you the procedure you use to figure it out.
Dave
