Battery Recommendations (size,brand, etc.)

[66LSx]

Alright guys... all of you higher use current draw guys pipe up.

I'm a LS (5.3L/4L60e)swap (electric fuel pump, ECM, DBW, EFI engine, 10 gauges, HID headlights[eventually] etc) all utilizing high draw conditions at startup.

The alternator is up to the task (OEM 2005 Silverado 160 Amp Alternator)

Looking for recommendations as to battery size even. (Looking up the 1966 truck shows a few different group sizes..which one is even correct?)

group sizes: 34, 25/75, 24 all show up... I have no idea where to start or what 'size' is correct for the OEM 1966 battery tray.

Thinking optima red top with dual sets of terminals (front and side)

Recommendations and correct group sizing??? ready..... GO!