Thanks for the advice ...
After I posted I got to thinking. I have a vintage Pioneer silver system with both the SPEC 2 and SPEC 4 amps, SPEC 1 pre, Tuner, EQ, cassette deck (CTF-1250) I even have the reverb unit and "dynamic range expander" The whole think is rack mounted and ditched in my bedroom with a sheet over it. I cant even think about getting rid of it and it drives my GF nuts. It was my first real system out of college. To make a long story short - I am building an HT/Audio room next year and I will relocate the Spec system in there as there is plenty of room. I can also finally hook up the Pioneer HPM-100's I have stashed in the garage.
I am seriously thinking about your idea - DIY the Denon and mate it up with the Pioneer system. I have one of the amps and the SPEC 1 rebuilt so far (new caps etc) by a local expert. The 62L fits the era of the old Pioneer and it has a built in phono stage so I should be good to go. I just need a second set of HPM-100's but that shouldnt be too difficult. I will have my local tech go through the second amp and keep all the switches clean on the EQ and tuner. I turn it on every once in a while Id like to hear the Denon played through it.
One more reason to keep the Denon. It was such a bargain I cant expect to make enough cash off its sale to justify getting rid of it.