I'm guessing you have a big block? I have the Edelbrock #66112. They fit great. They also have provisions for air tubes. The only draw back is they are a little pricey. $600.00
Eldogg
I put hookers on it and did away with the air tubes but I'm having problems with the O2 sensor its not getting hot enough so its leaning out the engine has any one came across this problem and if so how did you fix it I'm thinking ceramic coating my headers
Ceramic coating should keep more heat in the header. They look a lot nicer also.
I think the preheated sensors only have an extra wire for power so that maybe would be an option. I don't know about calibration and what not on those though.
Mostly just answering to look smart and build my post count.