This is a progress of my 89 gt convertible build. First mods were off road h pipe and 10 series flowmasters. Second mod was 3.73 rear gears. I've done regular maintenance like plugs and wires. I'm now doing a gt40 head swap in the next month. Have to get all the parts for the swap. Got a baseline dyno all stock other than the exhaust and gears at competition auto. Its an aod daily driver. I'm hoping after heads and intake swap I'll be at 250-280 rwhp range and 300+ rwtq with 12-14° of timing