crank position sensor

[98withbang]

i am attempting to build a 350 with the stock induction to put in place of the "4.3 that could" until it broke i have heads 062 and an intake off of a 97 350


Crank position?
i have noticed but havent looked in to seee what it involves i no that it is in the timing coverdoes it read off of the actual shaft or off of the main timing gear if so i shouldn have a prob with using an old style short block just a new timing set and cover(prolly the one off of the 4.3) and any one who could throw in two cents about what im up against with the computer would be greatly appreciated i expect ill need a new one with the correct wires for the v8

thanks