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A. Engine will be mounted no further back than center of number one spark plug hole in

line with center lower ball joint [1-inch tolerance].

B. No high-performance parts. Crankshaft and connecting rods must be O.E.M. to block

with no lightening, grinding, knife edging or polishing of any type. No marine parts.

Absolutely no strokers. Balancing is allowed. No after-market rods or crankshaft.

Wrist pins may float.

C. Maximum overbore – 360 Chrysler will be 0.40. Ford, Chevrolet, and 340 Chrysler will

be 0.60.

D. Stock cast iron 2 or 4 barrel intake manifolds only. No after market, marine or propane

intake manifolds. No fuel injected intake manifolds. Absolutely no reworked intake

manifolds including No coating,painting,grinding, port matching, polishing or acid porting

work on the inside of the intake manifold. A maximum of 2 external cooling lines from the

back of the intake manifold running along the top side of the valve covers and entering

the thermostat housing or spacer is allowed. Cooling lines can not go to the water pump,

side of the block or any other part of the assembly.

E. No aluminum heads, intake manifolds or blocks allowed. No Bowtie or SVO blocks,

cylinder heads or intake manifolds allowed. No oather after market blocks. Heads or

intake manifolds allowed unless allowed by a specific rule oulined in this rule book.

Grinding in the lifter gallery is allowed. No splayed main caps or after market main caps

allowed.

F. Maximum cubic inch – Chevrolet 360.4 c.i.d, Ford 362 c.i.d. and 360 Chrysler engine

will be permitted a maximum displacement of 367 c.i.d. Any flat-top pistons allowed.

Stock bore and stroke. Rods must match block. Chevy rod length 5.7, Ford Cleveland

rod length 5.78, Ford Windsor rod length 5.965, Chrysler 318-340 and 360 must use

6.123 length rods. GM (OEM) powered metal rods allowed, must be 5.7 in length. NO

dome pistons. Stock block may be decked. Pistons may not protrude out of block on

top dead center. Must be even or below block on ALL MAKES.

G. G.M. may use any production head with a maximum intake valve diameter of 1.94;

maximum exhaust valve diameter will be 1.60. No angle-plus heads allowed on Chevy.

The only aftermarket heads allowed on G.M. are the World Products S/R, no.s 4351,

4361; 1.94 intake and 1.50 exhaust, and the Dart SS#10024361 with 1.94 intake and

1.50 exhaust. No "bowtie" or Vortex heads allowed. Vortex cast no. 10239906. Other

casting numbers not allowed are 14011083 and 14096217, 10239906, 1012532,

10208890 and 12554290. No magnum head. Chrysler may use a 340 head on a 360

block. No W-2 heads allowed on Chrysler. For Ford, Windsor heads must match a

Windsor block and Cleveland heads must match the Cleveland block. The only GT40

head castings allowed are FIZEAA and F3ZEAA. No A.R.D. heads allowed.

The only aftermarket head allowed for Ford is the Dart Windsor Jr., part no. 5303, with

1.94 intake and 1.60 exhaust [casting no. 1-056]. Screw-in studs allowed. Pinning studs

allowed. No roller-type or roller-tip rockers allowed. O.E.M.-type stamped steel rockers

only. No roller cam. No modifications of any kind allowed on rockers except oil hole may

be deburred. Guide plates allowed. No stud girdles allowed. Lifter valley pan and rocker

poly locks allowed. Stock diameter valve springs only. All other makes of engines must be

WISSOTA-approved before they are allowed to race. No beehive/conical valve springs

allowed.

H. Any flat tappet cam allowed. No mushroom cam or lifters allowed. Lifter bores may be

bushed. Lifter size must match block bead used. Lifters must be steel or iron and must

be free to rotate.

I. No grinding or polishing of any kind allowed on heads and intake manifolds. Valve

seats may be ground no further than 1/4-inch below top of seat. Head may be milled.

Push rod holes may be drilled larger.

J. Any fan, water pump, or oil pump allowed; any type pulley allowed.

K. No dry sumps allowed. No gear drives allowed.

L. Any radiator allowed; must remain in approximate stock location.

M. Headers allowed. No weed burners. No exhaust in driver's compartment.

SEE SECTION 3 UNDER MINIMUM SPEC IN FRONT OF RULE BOOK FOR NOISE

SUPPRESSION RULE. [NO 180-degree headers allowed.]

N. Stock type distributors only. GM, HEI distributor can be interchanged with Ford and

Mopar engines. Coil location must match distributor being used. No multiple spark boxes

allowed. No magnetos allowed. No crank trigger ignition.

O. No after-market harmonic balancers allowed. O.E.M. stock balancers only. Balancer may

be degreed but must meet size requirements below. No modifications of any kind

allowed. No 283, 307 or 327 balancers allowed on any engine other than a 283, 307 or a

small journal 327. Minimum size 283-307 and small journal 327 is 6-1/8 by 3/4 inch

thick. 305-350 and large journal 327 minimum size is 6-3/4 by 1-3/16 inches thick.

No fluid balancers. No hubs only - balancer must be two piece.

P. No titanium parts of any kind allowed.

Q. Minimum 3/4-inch inspection hole in side of oil pan 2-1/2 inches down from pan rail in

line with a journal. Inspection hole must be easily accessible to inspector.

R. Valve timing configuration and firing order must match engine used.

Example: Chevy 18436572.

S. No vacuum pump/air pump allowed.

T. Floating wrist pins are allowed.

U. No bee hive-conical type valve springs allowed.

V. No external oil pumps of any kind allowed.

W. Main girdle not allowed. Crank scraper not allowed.

A. Carburetor: must use stock 4412 carburetor body only. No adjustable/changeable air

bleeds. No after market or billet metering blocks allowed. Carburetor must be mounted

with float bowl facing forward. Carburetion will be limited to one (1) stock Holley 500

CFM 2-barrel, part number 4412, with a 1-11/16-inch maximum throttle bore. No grinding

or polishing of any kind allowed. All carburetor components MUST be for a 500 Holley.

No milling or grinding of throttle shaft allowed; shaft must stay round. The choke and air

horn may be removed: this is the ONLY re-working allowed; must have stock

measurements. Adapter plate: maximum thickness between carburetor and intake

manifold with gaskets and adapter will be one-and-three-eighths (1-3/8) inches.

B. Fuel must be gasoline only; 10% ethanol-enriched gasoline allowed.

NO ALCOHOL, NO NITROUS OXIDE, OR NITRO, NO NITROUS DEVICES ALLOWED,

NO METHANE, NO PROPOLENE OXIDE.

C. No Electric belt driven or piston type fuel pumps allowed. Must be stock diaphragm type

44 © 2009 WISSOTA Promoters Association w i s s o t a . o r g 2 0 0 9

fuel pump.

D. Fuel cell must be located within the vicinity of the trunk with complete metal fire wall

behind driver. Mandatory is a ball check or equivalent in fuel cell.

E. Carburetor must be mounted with float bowl forward.