radiator replacement quandary

[undy]

I'm getting ready to do my Taurus cooling fan install in the next week or so. I'm just not 100% sure that's the only cooling inadequacy I have. LSCs have a relatively small radiator, compared to other Cobras (22 x 19 actual size). That being said, I've always thought of the car as coming up a little short in the radiator department. I know the Taurus fan's going to help out but I'd like to further improve things while I'm in the neighborhood. The radiator has to come out for the fan install anyway. I'm currently running Griffin's dual 1 1/4" tubes "600 HP" rated radiator. I'm at the rated max HP now so I've a bit of concern being at the outer boundary of the radiator's limitations. The Griffin has served well for 9 years or so. The radiator had boiled over several times with the last engine so I'm sure there's some deposits plated on the inner tube walls, possibly hindering heat transfer. Griffin makes the same radiator, 22 x 19, with dual 1 1/2" tubes vs the 1 1/4", with a rating of "600-800 HP". It's of course 1/2" thicker so I'll have to do some mount modifications and remake my inlet shrouding but I think I can make it fit. The Taurus fan should handle the duty of sucking air through that thick 3 1/2" tube pack. Summit has it for $423. I think it would be worth the cost and effort. Tell me what y'all think...

On a similar subject tell me what thermostat mfr and temp rating you prefer along with any reasoning behind the preferences.

Dave