mrshleepy76

I'm looking into buying a used holley 650dp. Only problem is that the choke horns have been milled out on it. My question is being my car is mostly stock minus a stealth intake is it a good buy to get a carb with no choke horns and what would the down falls be if i purchased it.

Portmaster

The biggest problem is cold start up. If you can deal with a longer warm up time and cold stumble you will be fine. I run Holley HP carbs on my street cars and just deal with the extended warm up time and having to keep the cold idle up by foot. Before the HP series I ran Holleys with the choke towers milled off for better performance. Thats really about the only downfall.

mrshleepy76

I only drive my car in the summer so i assume i would just have to wait a few minutes till i drive away. But will i notice any throttle reponse differences and would it increase my cfm's.

Portmaster

The limiting factor on your car will be the head flow. If anything with a stock 5.0 it borders on a bit much carb. I doubt you notice much of a differance but it will depend on what kind of shape and CFM of the carb you had before and how well it was tuned and the same for the carb that will replace it. It's a good size carb that will support a good bit of power as your engine is modded. Like anything else it's all in the tune.

mrshleepy76

I am looking into getting a set of GT40 heads as well as a ford racing cam. Just have to figure out what cam would be best for my application. There is two carbs to choose from 600 or 650 both double pumpers. The carb i have on now is stock i was told the cfm was like 570

Portmaster

You can get a better cam than one of Ford Alphabet cams. You will be OK with the 650

mrshleepy76

which cam would you recommend for my motor and also i have a friend that has a holley street avenger carb 670 that he offered to sell not too old either do you think that might be pushing it

Portmaster

The 670 Street Avenger is actually the better choice because it's Vac secondary. As far as Cam selection goes I need to know a lot more about your car. Rear gear ratio, transmission, exhaust and weight, year ,etc

mrshleepy76

year is 85 i have to still install the 3.73 gears i have purchased trans is stock and exhaust is flowmaster headers with BBK xpipe and out with flowmaster 40s

Portmaster

85 could be Hyd roller or Hyd Flat Tappet. If it has the stock pistons they will have no Valve releifs. Is the trans auto or manual. Cam selection will have to wait until you know exactly what you have. It was a rough year for the 5.0 with mid year changes.