What is this guy? An idiot?
Those four base mounting slots are to affix the rectifier bridge to a heat sink. A real one. A finned aluminum sink the size of a 120-amp rectifier-type battery isolator. The base of the rectifier bridge is insulated so no worries about stray voltage. ALLELECTRONICS.COM sells a nice large heat sink that would work fine. Use transistor/CPU thermal grease to thermally bond the rectifier bridge to the heat sink. Do not mount with fins vertical. If you have an alternator with a rectified wye stator use a pair of full wave bridge rectifiers to rectify the wye.on your new package. You'll gain a substantial amount of amperage
These are fun projects.
And don't forget to twist the three stator wires between the alt and remote rectifier. Electronic noise cancelling.
