I'm on an extremely tight budget with my new motor, I've put most my money into the block, heads, and valvetrain. I want to keep everything else as inexpensive as possible and still be safe for the motor.

My question is, anyone using their stock fan/pulley and stock radiator and shroud on a high performance motor? I'm replacing a 307 with a pretty hot 357. I have a stock replacement radiator that's about 8 years old or so, and the heavy factory fan.
I plan on eventually going to an electric fan setup, but for the time being would the stock setup cool the new motor ok? I'll probably buy a high volume water pump, but if I can I want to keep the rest of the cooling system stock. I also think it'd be cool to keep it as stock looking as possible, except for the headers.

I've had some cooling problems with the 307, but I suspect that they are more due to timing/fuel issues and an old water pump, than problems with the radiator.

thanks,
Brian

I think 307s use the same radiator as a six cyl. engine. It might be marginal for cooling your engine. Does it need flushed or boiled out? I ran a roller 350 for a season with 11:1 compression with a factory 3 core radiator, a flex fan. stock pully's, and a shroud. It never got hot. I drove it as far as 160 miles to and from the track in up to 90 degree weather and it was fine.

If it has a 3 core rad, clean and in good condition and you run a shroud with a good quality mech. fan without a clutch it should cool.
Certainly a hi-flow water pump will help, make sure you don't underdrive it. Just my .02 worth.

How can I tell if it's 2 core, 3 core, whatever?
The factory radiator started leaking in the mid 90's, and my dad and I replaced it with the one that's in there now. I'm really not sure what it is.
Regardless, I'll flush it out good before re-using it.

Take the rad cap off and look down into the rad, how many sets of holes do you see from front to back. 2 sets of holes = 2 core, 3 sets of holes = 3 core.