My Marlin has a 460 tunnel ram in it.with Holley 450 on top.has 50 cc pumps on each carb.looking at replacing with new 450 tunnel ram carbs.but they come with 30 cc pumps in them.my motor does not big or studder .just goes.whats your thoughts on running 30 cc pumps.and what about a choke on one carb.gets a little old waiting for it to stay idling to get off trailer.why does tunnel ram carbs have no choke.thanks guys