Does yours still have the big Computer hanging off the air cleaner ?. As I
remember the lean burn came with a 4bbl thermoQuad. The factory used to
swap a two BBL carb/manifold for the lean burn because it was such a
problem. They used a carter BBD style carb. Any 2bbl from a mid 70's 318
should work. I have several 4bbls that will work if you want to change the
intake manifold, several NON lean buurn thermoquads & a aftermarket #9636
Cry specific Carter AFB in good shape, also a factory 77 service manual