Battery Choices?

Holley super sniper,
Is that a EFI? and is so, then there must be electric pumps.
I currently have stock cables, What upgrades would be beneficial? Now is the time to change.
If the electric loads have been changed, then the most important cables will be alternator output to the the distribution point(s). If that's a relay box or fuse box, or a junction, doesn't matter so much.

The denso alternator is also more like to provide a higher recharging current to the battery.
A larger battery is will have a lower percentage of its stored power depleted during start etc. So that should help reduce the recharge rates.
Group 24 was a common size on IIRC. Group 34 will also fit.

Good clean battery clamps and connections both pos and neg definately help.

Do beware that most brands have at least two lines of batteries. I know Dekka and Interstate do.
IIRC the better Interstate line is MP-Group size.
The better line has thicker plates and weighs a little more, but lasts longer.