Paul J You are right. I'm sorry for not replying to you sooner. I've been very busy. My "B" is '76 but I installed and older engine (probably early '70s)
I guess I'll install a catalytic converter for the test, then remove it afterwards. Well, there you are, I've answered my own question. Also thank you Kim for your interest. I bought a new MGB in 1966 (I was 17), I still have one now (not the same one). By the way, do you know what other seats might fit in the MG other than Fiero. I will look for your reply everyday. OK not everyday, but for sure every week. (maybe) Tks.