First of all, You dont really need a choke i found out quickly in cold weather, if your timing is set correctly and you pump the hell out of it it will start, Weather or not it will start running while its cold is a different story, Definatly stay with the holly and you can even hold the choke plate shut and have someone turn it over to get it to run. I have a mouse and i couldnt get it to consistantly run well in the cold either, till i set the timming correctly. If your son has a chevelle and your having problems with it. go buy some newer EFI car of some sort untill you can get it to run right or untill you can get your husband to help you with it becouse you cant really get all the pointers you need offline However you can go to the local auto parts store and pick up a Holly tuner carb hanes manual that will help tons.