Ron, Here is what I use:
http://store.summitracing.com/partde...5&autoview=sku
With my 1 inch NOS plate I cut 1 inch off of the top and bottom to fit under the air scoop sideways. Works great. Foam air cleaner doesn't even lessen hp on dyno. Checker auto carries them in their speed shop stores. The reticulated foam (like that word?) is available in rolls from certain craft stores so my replacement foam filters end up costing about 25 cents each. I paint them blue too!
AZ Bob