is this the 3.42 ratio for a 91 Formula TPI 5 speed?

I was going to put it into the RPO decoder but it appears to be gone.

Looked at a 91 305 TPI 5 speed today. T-tops, fully loaded, dual cats but drum brakes. 59,XXXKms

Crack head dealer wanted $15,XXX!!! Which is even way out of line for Canada---f-bodies are more money up here anyways but not this high

thanks!

 

Yea,GU6 is the code for the 3.42 ratio.My '91 has it .It is also a TPI 5spd. car with the R6P Performance Inhancement package with a drum brake rearend. Chris

 

RPO #R6P is that when GM had the Disc Brake part shortage and installed drum bakes with a credit to the buyer. I don't think you can call it a Performance Inhancement Package.

 

My window sticker list the Performance Inhancement Group with the dual converters,engine oil cooler and performance axle ratio(3.42). From what I understand, there was a shortage of disk brake rear ends in 91-92. I've seen several 350 cars that should have had disks have drums instead. Chris