Hey Woody9512... HEADS UP on your Magnaflow kit! Hopefully you won't have this problem.
I'll keep short and to the point....
I bought the 3" Stainless Steel exhaust kit MAGNAFLOW PART# 15852 for my 71 Cuda, 340, 4 sp from Summit Racing. I polished the system to even more of a shine. Prior to test fitting.
The system does "NOT" fit 4 speeds and "through valance" tailpipes!!!
The "X" portion hits the reverse linkage. The tailpipes not only turn down prior to valance but are curved wrong over the axle.
I went rounds with Magnaflow (trying to save Summit the trouble)educating them that their system would not fit and ask for a resolution.
The customer service guy and the top Sales manager at Magnaflow told me "too bad" and to "take a hike" (No kidding!, I was shocked). They said they had not run into this before. We verified correct part number and schematics.
I told Magnaflow that they need to change the website and notify their vendors. They did say they would look into changing their website details and application and notify the vendors. riiiiiight!
Anyway, Summit Racing re-imbursed me for custom fitting of the tailpipes and having the reverse linkage fabricated.
Summit was awesome. They helped me find a shop that had the special mandrel bender.
That is customer service!!