I would strongly opt for the 79' unit...they are much better performers...If yours does not have An electric thermostat in the choke housing you can opt for one you can buy the for $ 18.00 for a 83 camaro I think.... Once you get it set it will work nice ...the choke pull-offs are sensitive a 1/2 turn either way will make a HUGE difference in cold weather...

Also If you use the 327 350hp cam ( .447 lift and 222 dur@ .050) You WILL have to enlarge the ilde bleed curcuit to get it to idle proper.....Just using the carb as is, it will not like to idle correctly and will stall and stumble...