I'm getting ready to prepare for my 180 headers. Do I need the swirl tank, or can I get away with an inline pressure cap and the puke tank alone?
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You can get by without it, but I would check the radiator for air often. You can also rig up a surge tank like I did the 4.6 conversion and put it on the inlet side and it will automatically purge the radiator of air.
I second that Will. Install a surge tank, with a pressure cap on the tank. The overflow tank can be used as the surge tank quite easily, it needs a lower outlet welded on & then plumbed into the suction of your water pump, perhaps via a nipple on the pump. Air bleeds from the radiator & motor outlet to the surge tank will keep the air out of your system.
A side benefit, you'll increase coolant flow and improve the cooling system performance.
cowboy from hell
A side benefit, you'll increase coolant flow and improve the cooling system performance.
cowboy from hell