yes money would be a concern thats why I want to use the parts off the old parts truck ,I wonder if it will run better with a cat than without( and cleaner).I have also heard of using 2.5 pipe from the muffler back.My truck runs fine now,I would not go out and buy this stuff but Ive got it on the parts truck in the yard.

oh what a feeling:
#1 86 xtra cab 22R,EB 261 cam ,Hooker header,2" ex with cherry bomb, Aussie powered
#2 86 sr5 4x4 efi parts truck
#3 87 2wd parts truck
84 supra yard art