proform main body

[my454s10]

im think about getting a new main body from profrom...but i can\'t find one for a 850..im i not looking in the right place or what...also i see that the 650 and 750 have the same part number for the main body...how can that be...???and last is it worth the money

[ZZ4Blazer]

I dont\' believe they have them for the 850. Essentially, using the main body turns your 650 into a 750. THey\'re supposed to flow 770+cfm.



I got one for my 650. I need a 750, and it was cheaper than a new carb. I could tell a difference after installing it. Looks sweet too.

[83jimmy]

i just bought one,but i wont have it on till next week.ill be switching from the 3310s to a 750 dp with the proform main body.and i have the bigger headers now,almost anyway.i cant get the driver side in.



but how much horse and change in et should i expect?ive ran a 12.49 and want an 11 before the end of this season.

[stangchaser]

well if you want elevens juice it

[ZZ4Blazer]

yeah, I doubt that a carb swap will drop you half a second.

[83jimmy]

i also got the bigger 1 5/8 headers with 3 inch collecters.and itll be 3 inch with dumps,and 40 series flows.i had put a set of sportsman 2 heads and got nothing.i had ported 487s with 75 cc chambers and 1.94 valves.i should have dropped a half sec with that.something was restricting it.so im changeing the exhaust,carb and fuel pump.i had a stock one and now i have the holley 110 gph.



my world heads have 64 cc and 2.02/1.60 valves.my old headers were 1 1/2 primaries and 2 1/2 collecters with 2 1/2 duals and h pipe ,40 series flows.and a dual feed 750.



when i put the double pumper on last off season,i went from not even chirpin 2nd to unintentionally switching lanes sideways.



just let my heads come alive and ill hit an 11.

[83jimmy]

i did drop a half sec.12.06 at 110 .5....ive ran 110.89 though,we had a head wind.