My 50 Fleetline deluxe is receiving a 350 SBC with T5 5spd, cable speedometer connection. Do these hook up easily to the original speedo in the dash? Anyone done this? I would like to get a replacement, vintage look, GPS speedo/gauge cluster but can't really find one I like, so maybe have to stick with the original gauge if it will work. Thanks for any info or experience y'all can share.