The hoses were a nightmare, luckily I have a contact who gave me a book and I ordered it all and ran the pipes, then a local Hot Rodder bought around his crimping tool and crimped it all for $50 !! The suction line splits and heads up for the front A/C, and out under the left mudguard (fender) to go to the rear unit, which is out of a Jap truck, new. I bought a heap of this insulation / sound deadener out of GM cars at the wreckers for $25, cheaper than all that hightech stuff and works a treat.
The rear heater goes under the centre seat which faces backwards. Under the floor are two condensors with 4 x 9 inch fans. This means I can only run a single exhaust down the other side of the car.