Peace be upon you There are Chevrolet engines, specializing in "Is" engines, "Is" factory condition, imported, and overhaul with a 7-month warranty on the engine. There is modification of engines upon request, such as camshafts, porting heads, and intakes according to customer request. Overhaul of 6-speed transmissions with a 7-month warranty. There is a conversion of 4-speed to 6-speed transmissions and conversion of the interior to any model. There is engine block surfacing for 6.0 and 5.7 engines upon customer request for Caprice, Camaro, Denali.. and other Chevrolet cars.