thanks guys for the extra feedback .
Im thinking i might try the HD fan hub first - cheapest .


Tex

ok
just thought a little more follow up would be nice .
Thank you CSK . I did buy the HD hayden clutch . It seems to be running about 20F cooler . Now i now it is winter here not that it gets too cold . . But its a hell of an improvement so far , as it was engine was getting quite warm in the last month or so as winter set in .. Will see how it goes on longer runs and as air temp goes up .
It would appear that with the Mopar Performance clutch and fan being 1/2"off core , factory shroud , it was ok . Now fan is 1 1/2"or so from core , factory shroud , that Jag hub would not engage/pull enough air through .


Tex

Thanks for the update , I was wondering if you made any headway with it, I also have a little trick to help keep them cool at highway speeds, let me know & I will post some pictures & explanation

CSK ,
we are kind of locked down so may be a couple weeks till i get a long freeway run . I never had issues prior till rad/fan incident so i expect it to , hope , it will also be ok then . I will let you know how it goes . Thanks again

Tex

I just installed an ACC 22" radiator in my 74 Barracuda w/440. Looks close to stock, I had to open up the mounting slots a little bit but nothing crazy. I used a reproduction shroud and did have to open up the notches quite a bit on that. Fitment on the shroud isn't great, there is a decent gap (maybe an 1/8th?) top and bottom. It's still better than no shroud and the contour of the tanks does match the contours on the shroud. A thin strip of adhesive foam or rubber weatherstripping would probably seal things up nicely. Fan is a 5 blade from a MP viscous kit with a matching clutch. I can (barely) fit a hand in between the bottom the clutch and the face of the rad, and the depth of the blades are set about perfect in relation to the shroud. So far, so good - seems to cool just fine and it's been in the 80s here the past couple days. For the money, I'm happy with it.

I have the Speedcooling ECP 26" unit in my '70 Charger. A shroud fits, not sure if it was stock for the application. I had a factory shroud in my stash that fit so I used it. It bolted up like stock.

I have a 22" core opening in my Challenger (a T/A clone I did back in 1978... was a 318 car, no A/C), and have used a couple different radiators all at 22" (typical stock designs).

Just recently, with a new 410 SB, I purchased a new U.S. Radiator (aka Cool Craft). Special ordered their "Tripple Flow" aluminum rad, having two 1" cores. I favored this brand because the tanks appear near to stock. The brackets needed slight slots opened up, no big deal, to mount to my factory original core support. The 22" factory shroud fit about 95% OK. I did notice that the rad core sits closer towards the engine, as opposed to the core support.. in other words, its not centered... having some extra space between the core support and the rad/tank.... I've decided to live with that... it could've been closer to the core support... I plan to install a top cover/shroud between the upper tank-to-core support. I painted the rad with Eastwood RAD black (after first using a primer).... looks very good overall.

While idling, driving on roads/hwy, etc.... no problems, stays cool (using a 180 thermst). I have an aluminum Chrysler 7-blade clutch fan (light weight..!) and I installed the Hayden short shaft Muscle Car clutch unit... that unit is a hassle to fit the bolts to the water pump... just barely any room.. and the face of the clutch unit sits too far away.. about 2" from the rad. The blades of the fan are inside the shroud only about 1/3 of the way... perhaps too short. But, at normal driving, its cool. (I may re-install my 6-blade large/wide aluminum flex fan w/spacer to see any difference, but... the recent racing rules have banned flex-fans... for safety reasons... I've never had any problem with it before).

I've just ordered a new Hayden HD clutch #2747... to bring the fan closer to the rad.. see if that will make any difference.

My recent dilemma is that when I do HPDE (road course lapping sessions for typical 20-minute sessions typical rpms 4000-5700), the temp goes up... way up (especially on hot 80-90+ days) ... so that I should turn the heater motor on full blast to reduce the temp a little (windows open!... hot inside car ... but not really that bad). I do have a large full width automatic trans cooler in front (fits perfect.. from a Dodge Cummins diesel PU)... all vanes are cleared and clean. I'm planning to make and install an upper cover between the grille-to-core support so to keep more air towards the rad (I see this setup on lots of road race cars, including the Posey T/A and similar vintage TransAm cars). I may also make some funneling walls behind the grille-to-rad to funnel more air directly to it.

I've considered installing a 26" wide rad... US Radiator has a setup to adapt to the 22" core opening... I just wish the engine would stay cooler during aggressive lapping HPDE sessions.... on hot days.

Maybe a cross-flow rad would be better.. even if it is wider ~26" vs 22".

just my opinion, i would opt for 26" cross flow radiator and a good factory dual electric fan setup.
your mileage will vary.