OK, first check your spelling. I believe you mean "Compliant", not "Complaint". That being said... go ahead and knock yourself out on cleaner emmissions. If that's what you want go for it.
Here in California, Motor vehicles titled as a 1973 and earlier are smog exempt. I have a 1959 gmc 1/2 ton long bed that will never require smog. I have a 1959 Pontiac 389 in there that has been bored and stroked to 447 inches. It has a 1957 Pontiac tripower manifold on it and is set up for 325-375hp... never dino tested, but it runs like a raped ape. I have no doubt this engine would meat the emissions standards for a 1959 vehicle. It also does better on gas than the 336 v8 that was in there.
My thoughts on the subject... if you really want to be green, why not convert it to an electric vehicle, or even a hybrid. I like to drive mine, and although mine is not stock, Parts are relatively easy to come by, and I don't need several parts interchange books to find the correct part. My truck is considered green because it would take more energy to recycle it than it does to keep driving it.
John
