after 9 years sitting in garage! i am taking her out

[71sc1]

she has been in the garage being restored & just sitting there . she is leagal to take out on the road. but has been raining alot so she has to wait a little longer. i am dying to see how she runs on the road, hopefully i won't have any issues with her. wish me luck.
Mark

[78 f250 supercab]

good luck man,
how'd it go?
an what exactly does it got under the hood, etc.

[71sc1]

it is mostly stock buick 225, i ported the heads & added an offenhauser(?) intake with a holly 650 carb. I did not get to take her out this weekend maybe during the week

[Tim]

Originally Posted by 71sc1

with a holly 650 carb

You might have issues with that carb. Most of those that have 4 bbl's on the 225 use the 390 cfm Holley, part # 0-8007, Holley Performance Products 390 CFM Four Barrel Street Carburetor0-8007

[71sc1]

Tim thanks for the info. I was mixed up I have the 390cfm Holly on my jeep, the 650 i have is going to be used on my 78' chevy stepside. thanks again.
Mark

[homewood4]

Does the Holly 390 give much better performance than stock or better fuel efficiency?
Fuel efficiency...what was I thinking?

[Tim]

Originally Posted by homewood4

Does the Holly 390 give much better performance than stock or better fuel efficiency?
Fuel efficiency...what was I thinking?

Holley 0-8007 - Holley Model 4160 Adjustable Float Carburetors

Carburetor, Model 4160, 390 cfm, 4-Barrel, Electric Choke, Single Inlet, Dichromate, Each $350.88



Holley 0-8007 - Holley Model 4160 Adjustable Float Carburetors – SummitRacing.com


These carbs require some re-working with additional parts to make them suitable for off-road, like:


Holley 6-513 - Holley Needle and Seat Assemblies

Needle and Seat, Off-Road, Viton, Adjustable, 0.097 in. Seat, Each $21.95, (need 2)



Holley 6-513 - Holley Needle and Seat Assemblies – SummitRacing.com


Holley 26-39 - Holley Fuel Bowl Vent Screens

Fuel Bowl Vent Screen, Fits Holley, Each $6.95



Holley 26-39 - Holley Fuel Bowl Vent Screens – SummitRacing.com


Or you could try this one with all the off-road parts installed, (although it's a bit big at 470 cfm):


Holley 0-90470 - Holley Truck Avenger Carburetors

Carburetor, Truck Avenger, 470 cfm, Square Bore, 4-Barrel, Single Inlet, Dichromate, Each $389.75



Holley 0-90470 - Holley Truck Avenger Carburetors – SummitRacing.com


and also, most likely, either carb will need to re-jetted, (more additional parts). If done professionally, one could add another $100-$200 to the cost of the carb.


You'll also need one of these:


Offenhauser 6035DP - Offenhauser Dual Port Intake Manifolds

Intake Manifold, Dual Port, Aluminum, Natural, Square Bore, Oldsmobile, Jeep, Buick, 225, 231, V6, Each $316.95



Offenhauser 6035DP - Offenhauser Dual Port Intake Manifolds – SummitRacing.com


So you could spend well over $700 to go 4 bbl. Is it worth it? I don't think so. You may notice a slight improvement, but I doubt you'd notice much more power after converting. The stock Rochester 2 bbl when in good tune does a great job both on and off-road.

[homewood4]

As always the BBS is a wealth of information...
more than I will understand. I will stick with 2 brl Rocky.
Thanks