67 original tack conversion

[jimmyjoe123456]

Hello, I am new member to this site but have been part of the classic truck family for 5 years when my dad baught original 67 chevy truck with a four speed and 292. I was in the 8th grade at the time. Since then we have painted it the orginal color, last year I rebuilt the 292 and I added some power into it. I got finished with the rebuilt after 9 months of work last aug. and then two weeks ago I baught a Tremek TKO 600 5 speed with overdrive and no useless granny gear. My question was about a tach though. My dad baught a gauge cluster from a different truck that had a factory tach. I plan on using this tack but I need to get it converted for a six cylinder from a v8. I have heard that there are places that can do this but I was seeing if anyone else has done this and has any suggestions. Thanks

P.S. I will post some pics of rebuild but as of now I dont have a whole lot of other photos of truck on my computer.