Board dimensions are 2.01x3.87 inches currently. The PA and heatsink will be at the end of the board. I'm using a mill to shape the heatsink from aluminum and meet both the PA mounting holes and board mount holes. Power requirements are at battery levels (7.2V optimum input). Connectors are included for a GPS module, OLED display ,USB Device and a Wireless Module. I've also placed extra GPIO, and CAN on connectors for future use.