my vette has an electrical 2 rong fitting, the th350 has a much smaller opening how do i get my speedo to work? is there a conversion part for this? also does someone make a conversion mounting bracket for an 84 vette for the crossmember?

 

Use the tailhousing from a Buick, Olds or Pontiac TH350.
It will have the larger hole that you need. Your local
tranny shop might have one gathering dust.