I'm the world's leading expert on v6 hosery:
1) First I'd suggest a cooling system kit:
> The hose from the header tank to the bottom of the rad and water pump is a big, complex, T-shaped piece and largely out of sight.. so maybe not
one to include.
> The Rad' top hose to the receiver behind the coils is a moulded tube, so one to have.
> Thermostat hose is a straight tube but tapered/reducing, so it's one to have.
> The small connector piece under the coil.. is just a short straight tube, so it would be no problem to "make"... just needs the right length, so stick it in the kit - just so people change it!
> The heater hoses to the bulkhead are annoying as you can't use straight tube (it kinks) so I had to use a connector at the "bend".. a pair of moulded heater hoses would solve the problem, so stick them in the kit.
> The long return pipe to the header tank... is a regular "straight" tube... so no problem to "make"... just needs the right length, so stick it in the kit.
That's just about it.
2) The other kit people might want is the intake:
> The two breather hoses that run from the MAF to the oil separator etc. (along the back of the inlet manifold) and the short breather outlet tube (to the separator). Again, straight tubing won't bend without kinking, so the ends need to be moulded (though the shortie could be a regular straight tube).
> Might also be a crazy idea to have the stubby tapered hoses for the chrome pipes..