We originally started with a holley 950 hp and it worked good on our 446. We sent it to Patrick (Prosystems) when we stepped up to a 493 and it worked great as is when we got it back from him. We have since stepped up to a 526 and still use that carb with great success!

Everyone will have an opinion but Prosystems was the correct choice for us and his service after the sale has been outstanding!