Need help with install

that looks to be a cross flow radiator, from the sounds of things your concern is running to cold?,, if so replace the thermostat or make sure it is working, these radiators cool very well, you may need to step up the thermostat to a hotter range.......any chance the engine over heated ? causing you to install this radiator? if so you may want to look into a related reason for the stalling from the overheating. just guessing on this

Yes it is a cross flow, I just didnt think it would cool this well. lol. The t-stat is a 185 and is in working order. I took it out before and boiled it to make sure it worked.
Yes i changed it because the slant rad. pop some holes in it. Needed a new one, so i got one for a V8 which is going in.

Am i just tripping on how cool it runs? last night i ran it for 10 mins in idle, giving it a little gas, otherwise it would stall, when it took my foot off, it stayed running!:cheers:
Do you think it just take the motor longer to warm up?