68 firebird overheating

I know to help you need all the info, so...
1968 motor rebuilt and installed in a 1968 firebird convertible. The cam is a street/strip, idles fine, edelbrock 650 carb, and timed to about 13
degrees. I have a new 195 thermostat, water pump, radiator, and clutch for the fan. There is no fan shroud yet, but I've had a '68 without one before and it colled off just fine. Also, without air, it was not always installed. I have a coolant cap thats rated at 15 lbs.
The darn thing gets real hot (according to the rally guage) and when I hit the hiway it goes to the max on the guage which I believe is 250? I put on an antifreeze bottle and hose to catch the overflow. It will overflow if I don't throw in the cluch and idle it as I'm doing 30+ mph to cool it down.
The water pump has the metal inserts in, and there's only one way to install them, but as I looked at the pump fins, they seem to rotate backwards from what I thought it should, but the new pump is the same as the old one. Maybe thats just the way it is.
Any ideas? Thanks
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Brian wrote:

You definitely need the shroud and a good fan AND a good fan clutch. Also a two core 21" radiator is marginal unless it's in REALLY good shape.
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snipped-for-privacy@sbcglobal.net says...

GET the fan shroud installed. That will solve all your problems. Also make sure you have the correct radiator fan. An A/C car should at least have a 3 core radiator too.
Going from an incorrect aftermarket 17" fan to a factory 19 1/2" fan made my '71 T/A go from pegging out the needle at 250 degrees to staying at 190-200 degrees all day long.
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The fan shroud is O/O from year one, all I have to do is figure out how many cores this radiator has...
Also, turned in the fuel/air screws from 2 turns out to 1.5 turns, and checked to make sure the choke opens.
Thanks!
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