I have a 1983 Audi TQC w/ a blown head gasket. I would like to up grade the performance at the same time that I fix the head gasket. Any suggestions, products that you know of, or provide? Have 1988, and 1985 turbo motors for parts at my disposal. Any suggestions as far as turbo/ chip upgrades? Help...NEED REAR BUMPER COVER FOR 1983 TURBO QUATTRO COUPE. Thanks in advance Matthew. 860-666-5755