94 chevy fullsize pu

Anyone out there do an install in one of these?Id like to use the factory radio and somehow run it into the aux input.Do i need to use a line output converter on the speaker outputs as the factory radio has no RCA'S.This truck has the square type radio that is near instrument cluster but they sell akit to put a DIN sixed radio in the middle of dash where there is a storage pocket.Any other problems i might have? MIKE

I have installed a few different HU's in those model chevys but never an empeg, but with the dash kit it shouldn't be that hard, as for using the stock tuner, you will have to get a line-out converter and use its rca's to put into the aux inputs