The above 603-703 might be able to mount in between the grill and the radiator supper (opposite to the windshield washer bottle) in the corner. I need to keep the height of the reservoir (middle) at the height of the coolant in the radiator. This means that a flat reservoir may need to be used in this area.

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1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)