Why don't you simply fit a lighter battery in front ? I run a Odyssey battery in my 68 Satellite , is about 1/2 the weight of a stock battery and keeps it right near the starter motor for short run battery cables . This car is a daily driver . I did recently swap out the power steering , good weight loss and et gain plus 1 less thing to go wrong .
Tex
New best ET 10.259@129.65 . New best MPH 130.32 Finally fitted a solid cam, stepped it up a bit more 3690lbs through the mufflers New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm Power by Tex's Automotive