Correct th400 kickdown switch for 70 bb

[kaphillips]

I have a 70 cst big block 1/2 ton truck that is missing the carb mount kickdown switch for the th400. My question is did all 70 big block use a unique 4 barrel connector switch on the carb that had spark arrest. Are did some 70 have no spark arrest and use the more common carb mount 2 spade connectors. Can multiple people with 70 big blocks see what is original for me. Spark arrest type or non spark arrest carb mount switches. Thanks people. Pictures would be greatly appreciated.