I read too fast!
I think you should add more choke blade angle (closed) when cold.
Sometimes you can just rotate the choke adjust plate, other times it's a screw that needs turning, or a rod to bend. I'm not shure what carb you have or what choke system.
A neat thing to try is to manually open or close the choke just a bit when the engine is having the problem.
Carefully observe the amount you need to close it to improve the engines running.
The engine will "tell" you what it likes by running better.
Make shure you have the stock air cleaner and heat "stove" pipe from the exhaust manifold. This brings hot air to the carb to vaporise the fuel for quicker warm ups.
Some systems use a thermal valve coming out of the intake manifold water outlet.
It has a bunch (four or more) of vaccum hoses coming out of it. When these go bad the choke can stay on too long and some people will then re adjust the choke to make it go off sooner. Then everything get's screwed up.
Check for bad vaccum hoses and leaks too.
Check my web page for First Gen Camaro suspension info:
David's Motorsports page
First Gen Suspension Page
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer