We are a manufacturing spinning company In Toronto Canada and we have been in business since 1980 and we make spun aluminum parts such as drop base filters for 14" 4150 carbs or 5-1/8 " flange and 16" dominator or 4500 series 7-5/16' flange filters for those hard to fit hood carb vehicles.
We have actually sold hundreds of our 16" dom drop base units all over the USA and Canada and even in Europe and we can supply you a custom fit to your HUGE motor in the car with NO hood clearance as only I can do that, what I need is a few minutes of your time to better describe to me your set up and I can put together the best working filter combos to feed air to your engine.
So far 1200 hp at the back wheels is the most I have heard of and has one of our 16" x 3.5" filter on it and the customer is very pleased with the filter and the performance.
WE are having a Racing Junk special right now for the 16" dominator filter any drop 2" - 1.5" 1" or flat across with a 3.5" K&N filter and a aluminum adapter ring brushed aluminum an K&N Xtreme 14" flow top on the top (black) for $299. plus UPS std ground shipping... and we will include a knurled knob free of charge our way to say thanks.