Before being called away to Germany by the U.S. Army, a 1988 Formula five-speed was the ride of choice for Samuel Barnes. With the help of his father, Sam learned the ropes of rebuilding and modifying an engine on his 305 TPI, before selling it at the age of 18. Six years later, the transition was made to a forced induction car with the purchase of this 1987 Grand National. Now enlisting the help of some of his friends, Sam added a TA-49 turbo and 42-pound injectors. A 62mm throttle body now makes good use of the added intake air volume, which is metered by an LT1 MAF. A 3-inch downpipe and Hooker exhaust round out the list of bolt ons, which has helped the GN go 12.14 at 111 mph in the quarter and 7.75 at 90 mph in the 1/8 mile. Boost was upped to 25 psi for those runs; also having the benefit of a 2800-stall converter and a rebuilt tranny by Lonnie Diers.