yep, weren't designed to fit ld motors. reformatted #7 downpipe to clear clutch linkage (stock) and double gaskets, other than that they fit ok

66 Belvedere Vert, 4 Speed/Jerico, slowly, very slowly, getting faster - NA LD Wedge
New New Best: 10.56 @129
68 B'cuda 4 gear Jerico - Another New Best of 9.86 & Trying to slow up
https://www.youtube.com/watch?v=T4jDLKwd9Gs