Not sure if this is a General question or drive train question....

Anyone have any experience with headers and dual exhaust setups? Original car had single exhaust. I looked in Ames and noticed they have Doug's headers and Pypes exhaust systems. I have the original exhaust manifolds still on the car, but I was thinking about removing them and adding headers (part no. D569). Their tech rep said the footprint from the highest point to the lowest point on the system is 13.5 inches. Not sure how low they will hang off of the ground once the vehicle is loaded. The tech rep said they have problems installing on cars with a locking steering column (not in 67) and some factory heads need to tap a stud in place on the back of the motor, though he says this is rare. This is something I really don't want to do if I have to.

The exhaust from Pypes is a little more confusing. They have two different configurations 2 muffler systems, where you can pick your own mufflers, an "H" system or an "X" system (SGF42=H Pipe, SGF60=X pipe). One is slightly better performance at the lower end, the other gives better performance on the higher end. This car is a driver and my racing days are behind me, so either would be fine. With these two systems I would be able to choose from three mufflers, I would probably choose either race pro or street pro. The third system choice is a single-muffler variety is their race pro muffler (quietest of the 3) mounted transversely on either an X or H system. In either case I will have to modify the reinforcement bracket underneath. It drops 3" from the original position, and the exhaust stays up at least that high but no lower than 3" lost. Original muffler was transverse mounted.

Spoke with a club member last night who said that he was happy with his headers and dual exhaust. Prior to that I was pretty certain I didn't want them because of clearance, and modification of the cross bracket spacer underneath.

I would be interested to hear any do's and don't's before I commit to this, and any advice would also be appreciated.

Thanks

67, 326, convertible, 4 bbl Holley, Edelbrock 2165, auto. 300 trans, A/C., stock heads.