Haven't had to hold a Delco Plug up for a mark 0 mod 1 eyeball lookee-see in more minutes than I care to remember. I do know that I still have a few decks of them down on the saw table but would have to check them for new or used. I ran Delco R45TX back when I still had the Monza and either the guides or rings had started to wear out. That little care got to idle a lot and idling in the cold tended to load up the 44's so I went one step hotter. Could have possibly gone to 46's but getting them was the kicker. The car itself is long gone; the motor remains though, sitting on an engine dolly, getting more and more dusty, under the shelving on the south wall. Some kid came onto me about buying the car cause he wanted to build a street machine out of it. He didn't want the motor so I retrieved it and mothballed, The car never did get built to the best of my knowledge. They were a total unibody and it would have literally taken a gut dissassably and installation of a complete custom full frame to do what he was thinking of. Back then the theory existed and if the welding technology had matched it then things might have been different. I didn't have my MIG's, never mind a shed to park them in or the wiring that would accept them. That and the door skins contracting a terminal case of acne due to being made of recycled metal that had not been properly purged of rust by means of the correct resmelting temperature pretty much put the period at the end of the sentence for me.
Only new car that I ever owned.
Nick