Q. My daily driver is a 1995 GMC Sierra C1500. It has a 350 TBI engine matted to a 4L60E transmission with a TCI Sizzler torque converter, a 10-bolt 8.5-inch posi rear end, and 3.08 gears. The entire setup has been absolutely bulletproof.
I’ve added a free-flowing exhaust, ACCEL plugs, Taylor 8mm wires, an MSD Blaster coil, an Edelbrock Performer intake, a Trans-Dapt TBI spacer, and a 14-inch Edelbrock air cleaner.
My question is: What else can I do? Can I change rear gears? What about cylinder heads? Also, would factory injectors from a 454 SS be too much for my 350?
A. It sounds to us like you’re on the right track. With a computer-controlled truck like yours, it might seem like the list of available performance adders is pretty short, but there are a few tricks left that can net you the extra grunt you’re looking for.
By adding a little more gear in the rear end, you’ll get a nice boost in acceleration, and a little off-the-line power. A 3.73 ratio set from Richmond Gear (RMG-4900411) should yield the perfect combination of acceleration and fuel economy for your daily driver.
With the rear end taken care of, turn you attention up front with a pair of Edelbrock Performer assembled aluminum cylinder heads (EDL-60859)—they’re CNC-machined for optimum flow, and that means improved throttle response and increased horsepower throughout the rpm range. And those big block injectors are a great idea. They’ll pony up the fuel necessary to get the most out of this setup.
Finally, bring it all together with a Motorvation custom chip to program your truck’s ECM to compensate for the bigger injectors and higher gear ratio.