The Mac will NOT work nor will the 79-93 BBK. Use the BBK for a 94-95 and you'll be happy, that's what I did and no leaks for 8yrs now.
I can get BBK through our parts store if you need me too.
I have the chrome plated Long Tubes and an off-road H pipe from BBK coupled to 2 chamber flowmasters and the stock tailpipes. The BBK's were alot better then the Mac's I've had on other cars.
Frdpwr