24. ENGINE OPTIONS/SPECIFICATIONS:
1. OPEN ENGINES: Any American make steel engine block allowed. Aftermarket and OEMperformance blocks allowed. Steel heads and block only. Any cast intake manifold. Flat tappetcam/lifters only. (NO ROLLER CAM OR LIFTERS) No mushroom lifters. OEM firing order cannotbe changed. Stud girdles allowed. Any rocker arm allowed. All engines must be able to be used inconventional passenger car without alterations. All belt driven accessories must be on front ofengine. Wet sump oiling system only.
2. CRATE ENGINES: All cars utilizing a GM604 crate engine must clearly display on both front roofposts the word “CRATE”. Must be contrasting in color from body, minimum two inches tall.Markers not acceptable. CRATE ENGINE: Must use unaltered sealed GM #88958604 or#19318604 crate engine with additional Cable-Lok system - NO EXCEPTIONS. (cable-lokrequired by 2016). Upon inspection, any different, altered or missing GM seal bolts or Cable-Loks will result in disqualification, loss of all Western Pro Stock Series points for the season,$1,000 fine and a 3 race suspension from all Western Pro Stock Series events. GM seal boltexception is WPS approved and issued Cable-Lok repair system, oil pan may be replaced by acertified repair center with Champ pan #CP100LTRB and Champ pickup #100SB. $250 fine forany crate engine not using required pushrods, valve springs or rocker arms. $250 fine for utilizingaltered rev-limiter components.