New Generation Slant six enthusiasts

Rainy, Sorry to say you are right. Like anything hobby wise it will have peaks and valleys.Slants were never that popular as far as Hobbiest go.
Less than 10 years ago we would have as many as 19 cars show for the MATS race in Vegas.This year 2018, 2 cars showed and 1 left early on the second day.
I raced for years with my Slant Dart.Sold it after 20+ years,built another but sold it after 1 year (dumb mistake on my part but that's another story). Like always times change, life, family wise changes too. I have plans to do another Slant streeter or maybe a drag only but that has been at least 5 years passing now since I started the project.For me it's a money issue.Play money just isn't there and to do something I have to sell something.I sold my 68 Valiant (273 V8) several months ago,was hoping to use that money on the project but it all went to things for the house and home.I will say I have been gathering parts along the way and maybe be able to get back to it this fall..Maybe.
I will ever remain a Slant fan.I have even considered pulling the HEMI out of my 65 Belvedere and making it a Slant car again that's how much I like them.
Can't really say if the younger generation will want to(or ever) be involved with Slants. Just recent we were talking about guys in the 60's that were in to the 40 something year old cars from the 30's. I will tell being a teen of the 60's I would have never even looked at a street rod, flathead, bullcrap car back then.
One more thing that I will address is the east coast guys are in to them more. They have a race coming up in Kentucky this September and looks like the have over 60 cars pre-entered.
Done with my rant.