Ac delco air filter no a1236c what outher filters fit?

This filter is used on the GM 8.1 Litre V8. AC A917C will fit, but A1236C is recommended for heavy-duty use. (See www.compnine.com) The A1236C has a foam pre-filter wrapped around the A917C element. Replacements for the A917C include FRAM CA3914, Purolator A34852