If your rules require a "steel bodied shock," look to the PRO TA Series for the superior driver feel of a twin tube.  These shocks are rebuildable and available in virtually any valve combination.    Each shock requires (2) WB200 bearing ends that are sold separately. A C327 coil-over kit will allow mounting of a 5” i.d. coil spring.   A C300 coil-over kit will get you all the parts needed for a 2 1/2" i.d. coil-over spring.  

MFG. Part #: TA750
Shock Type: Twin Tube
Extended Length: 19.50
Compressed Length: 12.50
Valve Positions: 5 compression - 5 rebound
Body Diameter: 2.00
Upper Shock Mount: 1/2 Inch Eyelet
Lower Shock Mount: 1/2 Inch Eyelet
Shock Eyelet Width: .625
Bolt Hole Circle: .500
Shock Body Material: Steel
Coil-Over Compatible: Yes
Hardware Included: No
Finish: Zinc
Sold in Quantity: Each
Notes: Shock ends are sold separatly. Need two part# 582-200S