Couple of questions Brian.
What is the center line distance from rubber bushing to rubber bushing?
What is the center line radius for the exhaust tubing bends and the diameter of
the exhaust tubing you are using?

Here is the preliminary cowl layout. The rads are 25 inches long by 16
inches wide for the water and the stock Mazda oil cooler along side
is 5 inches wide by 25 inches long overall. 19 inch cores.

When you get your water rad redone get a two pass. Greatly simplifies
the water plumbing.

Paul Lamar

I'm at work today, I'll double check those things and get them to you tomorrow. Also, I found that a supplier here in Seattle that carries 4 inch .125 thick box extrusions. I'll get a price.

The radiator is a double pass, I hope to get it modified to measure 18.75 x 20, 2" on each end is the end tanks, so that would give me a 18.75 x 16 core.
Thanks
Brian

 
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