Trunk Mounted ECM - Length of Wiring Harness?

[piratebaseball]

Hey guys,
'67 Camaro with vintage air under the dash. I have no room whatsoever to mount the ecm under the dash and I do not want to mount it in the engine bay (prefer to keep it clean looking). I know you are supposed to keep the ecm away from the radio which is what I'm mounting in the center console. Which brings me to mounting it in the trunk. I know quite a few people have mounted theirs there, but when doing the search, nobody said how long the wiring harness had to be in order to get it from the trunk to the engine bay. So, for those that did, how long was your wiring harness? I know most companies come with a 4 foot harness, just checking to see how much longer you had yours made?
Thanks!