Here are part of their engine rules:
Q. ENGINE CHARACTERISTICS
The following characteristics must be identical with the production engine upon which recognition of type has been granted. All parts listed below must originate from stock production castings and forging, which have been machined according to the normal machining schedule, utilized for standard production parts. No coating on any internal; engine components, including but not limited to ceramic or Teflon. Rod, main and cam bearings may be coated.
ENGINE BLOCK: Material, number of cylinders, angle of cylinders, angle of cylinders, cylinder bore, number and type of main bearings, integral or separate cylinder sleeves, location of cam-shaft, overall configuration.
CYLINDER HEAD: Material, number of valves per cylinder, type of combustion chamber, location of spark plug, arrangements of valves, valve location in relation to cylinder, valve angle, type of valve actuation, number of intake and exhaust ports, center distances and shapes of intake and exhaust ports, firing order, angle of port face in relation to mating face of head to block.
Crate Engine Rules
GM part #88958604 is the only crate engine approved at this time. Permitted to run GM Crate in Dodge or Ford Bodies.
The engines can be purchased and sealed through the racetrack you plan to run.
Seals are not mandatory to compete in the UARA
No Changes allowed must remain factory (rocker arms-harmonic balancer)
One .030 shim will be allowed under each valve spring
Carburetor allowed #0-80541-1 Holley 650 cfm. No spacer permitted. Stock out of box. Only change that can be made are jets and power valve.
All other Late Model Stocks are to be the same as Rules in this book.
Crate engines are subject to inspection at any time.
R. ENGINE LOCATION
All GM engines must be located so the center of the forward most spark plug hole on the right side of engine block is in line with the centerline of the upper ball joint.
Ford and Chrysler engines may be located so that the front of the cylinder head on the right side is in line with the center of the upper ball joint. Center of crankshaft must be centerline of the frame and tread width, front and rear.
S. ENGINE GROUND CLEARANCE
All engines must maintain a height of 12” from ground to center of crankshaft, with car at race trim and with driver
T. ENGINE MOUNTS
All engine mounts must be securely bolted.
Only UARA approved reinforced mounts can be used.
U. ENGINE DISPLACEMENT (V-8 engines only)
General Motors – 350 cu. In. – 4” / 3.480 Stroke
Ford – 351 cu. In. – 4” / 3.500 stroke
Chrysler – 340 or 360 cu. In. – 4” / 3.580
Maximum overbore. 045in.
The final displacement will be determined by totaling the displacement of all cylinders.
V. ENGINE BLOCKS
Engine blocks must be a product of the manufacturer of the make and model car being used. No aftermarket blocks permitted.
Block must retain all standard external dimensions with the exception of the maximum allowable overbore and the surfacing of the block deck. No angle cutting of the block deck permitted.
Aluminum blocks will not be permitted.
Internal polishing of the block is not permitted.
Blocks may be deburred.