Season 4

While Janice is on a mission to restore a 1960 Land Rover that has a growing list of concerns, Ron and Greg can't figure out what's wrong with the engine of a 1965 Chevy C10 pickup truck after they updated the transmission from a 3-speed to five.

David send Thomas & Larry to Canada to check out a 1970s Superbird collection. Meanwhile James and Greg work to upgrade a tiny '68 Austin Mini Mk2 with a more powerful engine.

Greg figures out how to fix a 1955 3100 Chevy truck. Later, Thomas and Ron try to restore a 1980 MGB that appears to have altitude sickness.

David and Janice attend the Concours d'Elegance in Pebble Beach, California. But when they are invited to travel in the prestigious tour riding in a 1924 Avions Voisin C4S, they discover the antique French car just can't climb hills.

David, Janice, Thomas and Brad head to the Concours d'Elegance in Cobble Beach, Ontario determined to take home at least one ribbon for the beautiful 1946 Alfa Romeo 6C 2500 Pininfarina Cabriolet Speciale they completely rebuilt.

Greg and Ron try to figure out why only 6 of 12 cylinders are firing in a '03 Aston Martin Vanquish; and David is at California's Concours d'Elegance, where he meets the entire design team from Aston Martin.

A magazine is publishing an article on the guild guys' Rat Rod, so they're racing to finish it on time; and Greg repairs a 1965 AMC Rambler Marlin's dual gearshift system, and a 1965 C2 Corvette Sting Ray that keeps overheating.

David has completely dismantled a 1940 Indian Chief motorcycle that he bought at auction and finds some surprises inside. Larry test drives his 1962 Daimler SP 250 with David, and they explore Larry's impressive hood ornament collection.

David takes Larry on a road trip to convince a builder to sell him a perfect replica of the 1960s creepy coach from "The Munsters." David later discovers that his purchase of a unique and valuable '97 Bentley Brooklands R may have been a mistake.

The Guild's complete rebuild of a Ferrari 250 GT Spyder is moving ahead with the arrival of a grill assembly; and David's obsession with collection tractors goes to the next level when 5 new tractors arrive from CA.

Janice and James can't get the engine out of the 1960 Land Rover; Larry takes numerous shocks as he and Ron try to figure out why the '48 Delahaye's cylinders aren't firing properly; and Greg and Ron wrestle with a serviced engine for a '91 Alfa Romeo.

David is on a reconnaissance mission at a Warplane Heritage Museum to research designing a fast and unique Belly Tank Racer made from an aircraft drop tank. Meanwhile, Janice completes a 1960 Land Rover and want to go off-roading.