For some reason the link to the transmission calculator isn't working on my computer. Will someone please look to see what the best combo would be for the trannies and rear-ends I have?

Trannies:
'83 5-speed from a 2+2
'80 5-speed from a 2-seater
'79 5-speed from a 2-seater

Rear-ends:
'83 R200 with CVs from a 2+2
'80 R180 from a 2-seater
'79 R180 from a 2-seater

Im most interested in seeing what my top speed will be with the R200 and different trannies. Also, which combination would be best for acceleration? Thanks for your help guys.

Here is the website:
http://www.geocities.com/z_design_studio/

 

Are any of the three trannies any different from each other?

 

I think its the 81 N/A that has the tallest 5th gear, and get a turbo diff. and that will get you your top end

 

Actually I am more interested in straight line acclereation but need to compromise and still have a decent top speed. I don't want to be doing 5000rpm in 5th at 80MPH if you know what I mean. That stupid freaking link wont work for me otherwise I just figure it out myself.

 

Looks like you'll have the best acceleration possibilities with the early 5-speed and latest R200. The gearing works in your favor that way...if you don't mind 3600 Rpm at 80mph. Here's what should be in them:
77-79 5spd
3.321, 2.077, 1.308, 1, 0.864
1980 5 spd
3.062, 1.858, 1.308, 1, 0.773
81-83 5spd is same as 1980 except 5th changes to 0.745

Rearends
79 R180 = 3.364
80 R180 = 3.545
83 R200 = 3.90

From my experience in my 1980 GL with T-5 and 3.90 R200 the gearing was awesome and still managed 25-28mpg on the highway at 80mph and 3300 Rpm.
The T-5 swap would be slightly better due to better ratios and its lighter then the other trannies. Easy swap too, just need T-5 crossmember, T-5, T-5 driveshaft, and T-5 differential flange. Plusa Mustang short shifter bolts right up.
3.5, 2.144, 1.375, 1, 0.78

 

Thanks man. Thats exactly what I needed to hear.

 

No problem!