Can ICON 05+ Tacoma extended travel coil overs work with long travel suspension systems?

No, extended travel coilovers do not carry over to long travel systems. A new coilover kit is required when switching to long travel. There are 2 options available:

59730 - 05-UP TACOMA/07-UP FJ 2.5 VS RR COILOVER KIT W LONG TRAVEL

59730C - 05-UP TACOMA/07-UP FJ 2.5 VS RR CDCV COILOVER KIT W LONG TRAVEL