damn I dunno whats up with the site I think my post went throu.
anyways I see you have 2 issues that you want addressed.
1.swaping an auto tranny in and dont want that to overheat
2.stroking a 350 and making sure it wont overheat.
these depends on the power demands.
if all you did was add 400 internals to a 350 and turned it into a stroker then you are fine ith the stock rad. and no tranny cooler.
the stall on the converter dosent mater really you are noy pushing an insane amount of tourque thru that converter.
if you went the whole way and you have ported and polished aftermarket heads,aggressive cams,open pipes,bored a min of .30 over stroked to 383 4 bolt main to make sure it dont blow up then yes you would need an aftermarket rad. and I would add a tranny cooler and at min a rebuilt 700r4 with extra frictions and extra steels in the clutch packs.
what numbers are you putting down with this stroker?
I re-read your post and it looks like all you have is aftermarket internals.
you SHOULD be fine with the stock rad.
and BTW I own and operate a speed shop in my town and been building cars for most my life.
The motor is done all the way just about. I bought an eagle 383 kit that came with pistons, crank (machined), an rods and everything balanced. I started with a bare block 350 with a .030 bore. I have pro-topline heads, a radical cam, its a 2bolt main but ive studded it so it should not blow up.
ts already built and so is the th350 transmission that getting put in. The guy said it would handle like 700 horsepower. Im hoping on putting out 400+ hp and torque with this.
Ive spent close to 4 or 5 grand on motor and tranny I think throughout the past few years but if I can avoid spending 300 bucks on a radiator upgrade that would be cool. I know that I will have to run a tranny oil cooler regardless…