i have a 1969 chevy truck that i am putting an engine from a 1993 chevy truck in it with a 700r4 tranny. i am keeping the factory speedometer from the 69 but i need to hook up a vss so i can hook it to the pcm and also to run cruise. i found 2 from the jags that run website that wire up to the computer but i am not sure which one to use the 2prs or the 4pac sensor i would call and ask them but they dont talk to there customers. can someone please help?