Good idea but Too bad that stuff is hard to find on this side of the pond 😉Crossmember doesn’t have to come from a g body I used one from a 1964 Chevelle 4dr I found in the junkyard 68 to72 have dual exhaust crossmembers along with 70 to 72 Monte Carlo’s not sure about The older BOP stuff I only had to shorten it an inch or two on both sides