Need Holley One Barrel Recommendation

I recently picked up an original 1976 Dart Lite with a 225 and 4-speed OD. It has been off the road for 20 years. The original carb and distributor are still on it, but it runs poorly and likely has some missing components of the "lean burn" system. I can source an original non-Lite distributor for a 225 with a manual trans, but would like to switch the carb too for the best drivability. Any recommendations on year and model--Holley 1945? BTW we have no emissions compliance in Montana. Any help will be much appreciated.