1966 mustang engine rebuild gone bad?
I have a 1965 mustang that had a worn 6 cyl 200 cid engine in it. Over the winter I had another engine rebuilt by our local engine shop. The rebuilt engine has numbers showing it is a 1966 6 cyl 200. So, Ive been doing the engine swap over the last 2 weeks with a friend of mine. Finally got to the point of starting it up yesterday. It would turn over, but not start. We checked for a good spark and fuel. Spark was good, but fuel seemed not to be there. We decided to put starter fluid down carb to try to start again. It kinda started to try to start, but we had a backfire, so we stopped. We decided to recheck all hookups to see if we had done anything wrong.
Thats when we noticed that we had installed the distributor 180 degrees off. To make things worse we had the spark plug wires wrong too, so firing order was off. After fixing those 2 problems, we tried starting it again. It took a while, but started up rough, then smoothed out pretty good. We had the valve cover off so we could verify that oil was appearing, it was. But then we noticed this "clunking" noise towards the back of the engine, towards the rear of engine/bell housing area but couldnt really nail down where it was coming from. We shifted the transmission thru reverse and park, etc and it seemed fine. Thats when we shut it off.
So, here's my question: Could that backfire I mentioned above have "broken" something? What could be causing the clunk,clunk,clunk noise? Engine shop do something wrong?
BTW, The transmission was refurbished and checked out also just last week during the install.
Thanks in advance.