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hello everyone, i'm about to repower my 1974 montauk 17 (which iv'e owned for 30 years) still has the original merc 85 no power trim motor - i bought a new yam f70 after reading many posts (wanted to keep the weight down) i'm looking for help on what i need to purchase for controls/wiring also i'm thinking of going with a garmin 742xs (or similiar) that can be used in place of tac and speedo gauges.

so far i'm looking at -
control box - 704-48205-ro
main wire harness- 688-8258-60-00 (20')
single engine key switch 704-82570-12-00

do i need ?
command link in line hub assembly 704-82570-12-00
command link/command link plus gateway mar-gtway-kt-20
main buss harness
pigtail harness

also any thoughts on if it's best to stay oem?

thanks any help would be much appreciated!