I just bought a pair of these off a member. Either A73A6 (S6 to 273/318) or A73LA6 (S6 to 340/360 I'm not sure which. The instructions link on their website is DEAD
"NOTE: The driver's side mounting perch on the '73 & Up K-member interferes with any V8 block and B/RB oil pump. To eliminate this problem, the driver's side engine mounting perch needs to be drilled with 9/16" holes and excess material must be removed. This effectively lowers the perch and is detailed in the instructions."
"NOTE: The driver's side mounting perch on the '73 & Up K-member interferes with any V8 block and B/RB oil pump. To eliminate this problem, the driver's side engine mounting perch needs to be drilled with 9/16" holes and excess material must be removed. This effectively lowers the perch and is detailed in the instructions."















