I fitted a Summit Billet air cleaner 12"x8.5"x3.5" oval it is alloy and has a ball milled top with polished finish. The cleaner fits most holley and carter four-barrel carbs. Go online at www.summitracing.com
Tel (usa code) 1-800-230-3030
expect to pay $93 around £70
They also stock Edelbrock air cleaners.