[dmr22]

I have been a long time lurker but finally decided to get a user name because I have been unable to find specific answers to what the best bang for my buck build would be. I figured there are no better people to ask than you guys!

We are in the process of building a street stock to run next season at our local dirt oval tracks and the engine building game is completely new to me. I have no doubt in our ability to make the car handle, I just want to make sure we dont get out motored. Here are the rules we have to run:

CARBURETORS: Stock OEM Two (2) barrel carburetor, NO HOLLEY’S!!! Carburetor to be mounted to manifold. No adapter plates. Choke can be removed. G.M. Rochester, Ford Autolite & Chrysler will be allowed. Rochester’s will be allowed to Run Holley Jets. Venturi Size: 1 3/8” Butterfly Size: 1 11/16” MAXIMUM! MUST FIT TRI-CITY TECH GAUGES, NO EXCEPTIONS!
FUEL PUMPS: OEM Style block mounted fuel pumps will be allowed. No electric fuel pumps allowed. No pressure regulators or bypass returns of any type will be allowed.
INTAKE MANIFOLDS: Cast iron OEM intake, NO MODIFICATIONS of any type allowed. No grinding, machining, acid porting or polishing of any kind will be allowed. Weight must be OEM.
EXHAUST: Collector Type Headers will be allowed. Exhaust must run past rear of transmission.
FLYWHEEL & CLUTCH: Stock OEM flywheel (no aluminum). Stock single disk clutch and pressure plate per make of engine. Explosion proof bell housing required (scatter shields). Automatic transmissions to run explosion proof blanket or 1/4" steel scatter shield over converter. Automatics must have a working torque convertor.
HEADS: Engines and head castings - single valve spring only, screw-in stud guide plate OK. NO MILLING OR CUTTING OF VALVE SPRING SEATS TO ALLOW USE OF LARGER VALVE SPRINGS, MUST USE STOCK OEM VALVE SPRINGS! 
A. GM-350 CID, to use these castings only 487-882-997-624-126-493-185-339-441-993 
B. GM 305 CID, to use these castings 434-450-416-896-520-601- Intake: 1.940 Exhaust 1.500 MAXIMUM! 
C. FORD 351 W CID C90E - Intake: 1.940 Exhaust: 1.500 MAXIMUM
D. Chrysler 360 CID - Intake: 1.880 Exhaust: 1.600 MAXIMUM
NO PORTING OR POLISHING OF ANY KIND WILL BE ALLOWED! 
NO EXTENSIVE MILLING OR ANGLE MILLING WILL BE ALLOWED! 
COMBUSTION CHAMBERS MUST REMAIN WITHIN 3cc’s of STOCK

PISTONS: Flat top or dish pistons only! NO GAS PORTED PISTONS! 
MAXIMUM .060 OVERBORE ALLOWED ON ALL MAKE & MODEL!!
CRANKSHAFT & CONNECTING RODS: Stock OEM crankshaft & connecting rods, no aftermarket rotating assemblies will be allowed. Stock stroke (must match block #’s), No polishing, knife edging, chroming or lightning of crankshafts or connecting rods allowed. Balancing will be permitted.
IGNITION: Stock type HEI or point type distributors and parts. No Aftermarket Coils, MSD Ignition, or magnetos.
OIL PANS: "Claimer" style pans allowed. Inspection plug will be MANDATORY & must be inline with the #3 cylinder. Must be a minimum of 1/2" pipe!
CAMSHAFT, LIFTERS & ROCKER ARMS: Hydraulic/non roller only, stamped steel rocker arms only, no roller rockers or roller tip rockers.

If anyone could help me out in which combination would be the best bang for my buck to run I would really appreciate it!

[bigdog7373]

Those are some pretty strict rules! Why can't you use a holley carb?

[dmr22]

Originally Posted by bigdog7373

Those are some pretty strict rules! Why can't you use a holley carb?

They really are! And I'm not sure but they tech regularly.

[a1supersport]

What's the winning purse? Must be a pain to have to break it down every time you win...PLUS, have to replace gaskets. Hope the money is worth it.

P.S. Sounds like Bomber-class with all those rules.

[bigdog7373]

Check out some of the circle track engines on from jegs and build yours similar to one of them. Here are some that i found:
http://www.jegs.com/i/Blueprint+Engi...11CT1/10002/-1
http://www.jegs.com/i/GM+Performance...58602/10002/-1

[Hippie]

I know the early 400 SBC factory 2 bbl. intakes accepted the larger Rochester 2GC's if that helps you any.

[techinspector1]

Is there a rule limiting the fuel you can use?

[GMC boogie]

Is there a vacuum or lift rule on the camshaft?

[oldBodyman]

"Rochester’s will be allowed to Run Holley Jets. Venturi Size: 1 3/8” Butterfly Size: 1 11/16” MAXIMUM!"

that's the largest Rochester 2GC, rated 435cfm, minus choke you will not miss the Holley 500cfm. I don't think Ford or Chrysler have them that large. The carb will be the limiting factor.

if there is a flat weight limit, go for a 350
if the limit is lbs/cid go for a 305, 601 heads, 1.84/1.50 valves, bigger just get shrouded

You said best bang for the buck, 305s are virtually free, same stroke as the 350 and the heads will not limit this with a 2bbl.

Have fun with it.

[sqzbox]

using a cross over pipe will net you a few more ponies! Other than that, tire size, rims, and backspacing will help with the traction.

[Turdpolisher]

I helped a friend go through this exercise several years ago. Here's some suggestions I had for him:
These "tight ruled" classes are ment to keep the motors pretty equal so very little gains can mean big advantages.
Bore it .060 over as the rules allow - bigger cubic inches
Reduce rotating mass by using aluminum pistons - spins faster - quicker.
Use thinnest head gaskets possible (I think there is thin copper available for 350 Chevy) for higher compression.
Use smallest CC heads that have maximum intake/exhaust valve sizes for higher compression.
Use smallest/lightest harmonic balancer possible - lowers rotating mass.
Use smallest alternator possible and cut down or remove fan to cut drag. Use a larger than stock pulley for reduced drag.
Use low flow water pump with oversize pulley for less engine drag.
Install crossover pipe in exhaust to scavenge waste gases from cylinders.
Remember - look for small advantages in reduced drag on the engine - saving 25 to 30 hp rather than trying to make it.

[techinspector1]

Good post by Turdpolisher. To expand on his thinking, here is a book I have owned in the past that everyone should own. It has 1001 little tips and tricks that you may never think of on your own.
http://www.amazon.com/1001-More-High...0195256&sr=1-5

[sqzbox]

Damit Tech, why did you put that on there?
At $2.30 I bought it!

Now I gotta hide it from the wife!

[techinspector1]

Originally Posted by sqzbox

Damit Tech, why did you put that on there?
At $2.30 I bought it! Now I gotta hide it from the wife!

I know, I was looking for my copy and couldn't find it, so I bought another one today.

[dmr22]

Originally Posted by a1supersport

What's the winning purse? Must be a pain to have to break it down every time you win...PLUS, have to replace gaskets. Hope the money is worth it.

P.S. Sounds like Bomber-class with all those rules.

Ya it really is similar to a bomber class but I am glad because it does keep costs down. Especially compared to what we are used to in the modified class. The purse is $450 to win and $50 to start so I think it is worth it, it doesnt hurt that we absolutely love the sport!