i have a ct top end that has the HUGE exhaust port also, it is way larger then any other one i have seen or that i have. even bigger then the
almost famous Q 540hrd. i never got to run it, but when it was given to me the guy said that top end hauls the mail.. thanks for the post Jerry.
i will try to measure mine to see if it was the same as that one, if you think you might remember what that one was. but mine had a little more porting
done than just the exhaust.