Currently I have 4AWG Power and Ground Wires connected to a JL 300/4v2. 4 Speakers, all 4 ohms. no problems

I have a JL 8W7 (3ohm), JL 250/1v2 amplifier, and a 1 Farad capacitor that I want to add.

Can I run the existing 4AWG (+) to a power distribution block and split it into 2 more 4AWG connections for both amps? 80A fuse at the battery and 40A fuses from the distribution block.