Looking to buy a TB for my 01 2500 360. i noticed alot of guys have Fastman TB's. i was thinking of going with the Holly 52mm. any advice anyone could give would be good. also looking for new heads and cam. if anyone has either let me know what you think.

 

I ran a Holley 52mm for awhile and it was fine although I have done quite a bit of work on my motor for improved flow for exhaust and intake. I am not sure what you would see if your motor is stock, probably a loss in bottom end with a 52mm, you will never see its full potential with a stock intake manifold and heads either but thats a whole nuther story. I had no trouble with the Holley and the craftsmanship was excellent, just make sure you don't get one that has been sitting on a shelf for years as the first ones had some machining problems- IAC plunger sealing face not machined correctly so you could never get the idle right. I have never owned a Fastman so I can't say but everyone seems to like them that has em. If you do alot of towing I would go with a ported 50mm. The best thing to do is decide if you want to build your motor for torque or for horsepower [more a hotrod and not a working truck anymore,450 hp at 6000 rpm isn't much good for rockcrawling] and then go from there, that decision will save you lots of $buck$ and headaches down the road.

 

Fastman Throttle Bodies recommends the 52mm for the 360 and 50mm for the 318. You should be fine w/ the 52mm.

 

Unless you do alot of towing then he [Fastman] also recommends a 50mm.