Our LT1 swap into the 79 Malibu needs a solution for speedometer. We have the 4L60E with the swap so there is an electronic signal to and from the PCM that will be available. We dont want to hack up the original horizontal sweep speedo in the Malibu but since it normally works off a mechanical cable, I guess it wont be reading for us since the 4L60E has no cable drive. We were thinking of installing a stand alone GPS speedo and calling it a day.

I know we can buy expensive electronic cluster for the Malibu we're not loving that idea.

Do any of you have any other ideas or suggestions on speedo arrangement in a swap like this?

The GPS idea would probably be a 2" A pillar pod mount like this from AEM. > AEM GPS Speedometer

Thanks