About a $30,000 and up Cougar if restored right. I would verify what is there in the parts. Like the air cleaner. Check the vin stamp on the engine to see if it is original. This would be the top of the line performance Cougar for the 67 model year.
Yes, not federal mandated until January 1 1968 to have a partial vin stamp. before that it was spotty on the performance engines according to sportyworty in a conversation a few years back. He stated they stamp some of the performance engines for warranty prior to 68. The 67 GT was the performance engine for 67 so I would think you would find it on an original. I just bought 67 GT with the original drivetrain intact. I’ll check it tonight. Also, look at the front of the p-side cyl head in case the heads got swapped. Brian Aust has an original 67 GT as well that could check for a vin stamp.
The 168 is the number of XR7’s with the code 6 close ratio 4 speed. You also have non XR7 code 6 close ratio and code 5 wide ratio and XR7 code 5 wide ratio.
We have seen many GTEs sell for good prices but I haven’t seen or heard of how much one of the 3 G CJ 4speeds has sold for. Except the one I passed on in the 70s for $3500 (sunroof).