[1971ls6]

I put a 1 inch spacer on my 71 and it did clear the BB hood, but was real tight.I remember in high school and the fastest car around was a 70 LS6 chevelle, it had 4 mufflers and 2 air filters,one on top of the other with no spacer. All 4 mufflers ended before the rear end, it was real loud and fast