Hope I'm not missing something here. As understand what you want to do is connect the pipes on the block to a hose. In the past I've been able to use compression fittings for situations like this. 4 Seasons makes the fittings I've used before...... I've had good luck with them and all you need to install them is a couple wrenches.
1957 Plymouth (Hemi, Dual Quads, A833 4 Speed 9 1/4 w 4.10) Sold
1937 Dodge Pickup (Hemi, 6X2 intake, 46RH, Dana 60 w 4.56) Sold
1968 Plymouth Valiant 2dr sedan (354 HEMI, 46RH w/4.30 gears)
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