Ahhhh, the ol' Cherry Bomb! Back in the 70's a lot of guys put them on their trucks. I'm not sure exactly how small of a pipe they used but it sounded horrible IMO, but a ton of guys used them.
During that time I had a pair of Thrust mufflers on my 68 RS Camero. When I bought the car it had a cracked base plate on the carburetor. It dumped a bunch of fuel in those mufflers for the first few month I owned the car. They were both on the collectors with no pipe behind them.
It's a wonder I didn't catch that car on fire. The flames coming out of those muffler during deceleration were quite impressive!
When I rebuilt that motor in 1978, 327cid I changed the heads, intake and pistons. I also swapped out the 3 speed with 4 speed from a Vett. The original rear end didn't last very long so I put rear end out of a 1969 SS Camero.
When I dropped the mufflers on Fridays for street races during the weekend...it's no wonder I'm so hard of hearing now. You couldn't scream at your bubby and him hear you when I had my foot in it!
Ahhh, those were the days!
My car got a write up in the high school news paper and that was the only picture I have of it...it was a bad boy!
M50 15 tires normally lasted 6 months and the clutch about 9 months!