Fast: 55 km/h max, to date; distance 22 km to roughly 50% DOD, featherfooting it.
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Evicted 2 batteries from the passenger compartment tonight. 2 more tomorrow or Friday...
Front batts actually rest on the rad support, which had a seam that I hammered flat.
They'll be supported by a length of bed frame triple bolted to the car's "frame rail", with additional support to the top of the rad support.
Finicky top double rack. Currently 4 bolts through the seam in the firewall (top), one through the trans/engine mount (lower center of car), one more through the firewall (lower r. side).
There's 3/4 in. clearance from the motor to the rack (room for the drivetrain to move - which it doesn't really, since the motor doesn't vibrate, but just in case). With the hood closed, there's about 1.5 in between the tip of the forward battery posts & the hood.
All the batts will have proper "tie downs" with threaded rod & angle iron across their "free" sides.