I just purchased an 89 supercoupe a couple days ago. I made up this list from what I've found searching here. I'm looking for opinions on these parts because I know really little about supercoupes and their aftermarket right now. Any comments/suggestions would be appreciated.
$480 -- Forged pistons for Thunderbird Super Coupe (http://www.moranav6racing.com/)
$300 -- FORGED RODS (http://www.moranav6racing.com/)
$2350 -- 3.8L Thunderbird SC Performance Heads (http://www.apten-us.com/performance/tbirdsc/scheads.asp)
$225 -- 3.8L 1.73 Roller Rocker Kit (http://www.apten-us.com/performance/tbirdsc/rockers.asp)
$195 -- Complete Engine Gasket Set (http://www.supercoupeperformance.com)
$165 -- 3.5" Diameter Intake Tube (http://www.magnumpowers.com/tbrd_intake_tube.html)
$499 -- High Performance Intake Plenum (http://www.magnumpowers.com/tbrd_plenum.html)
$250 -- Pro-M 87mm Bullet Chrome Mass Air Flow Sensor (http://www.supercoupeperformance.com/Prom87.htm)
$350 -- 85mm Throttle Body (http://www.magnumpowers.com/tbrd_thrttl.html)
$360 -- B-H-J Billet Steel Harmonic Balancer (http://www.supercoupeperformance.com/BHJ Pics.htm)
$170 -- ASP SC underdrive pulley set (http://www.bluetonguemotorsports.com/ESMParts/ASPSCUnderdrive.html)
$615 -- Griffin High Capacity All Aluminum Radiators (http://www.supercoupeperformance.com/Griffin Rad Pics.htm)
$15 -- High Performance Thermostats (http://www.supercoupeperformance.com)
$15 -- SCP Pressure Release Radiator Caps (http://www.supercoupeperformance.com)
$135 -- SCP High Flow Fuel Pumps (http://www.supercoupeperformance.com/190 LPH Pump pic.jpg)
$85 -- Billet Adjustable Fuel Pressure Regulator (http://www.supercoupeperformance.com)
$85 -- SC 8 Rib 5% Billet Aluminum Supercharger Pulley (http://www.bluetonguemotorsports.com/ESMParts/SCSolid5percentBlowerPulley.html)
$1390 -- "No Wait MagnaPort II" Blowers (http://www.magnumpowers.com/tbrd_blwr_ser.html#blr_ser_nowait)
$330 -- Raised Classic Top (http://www.magnumpowers.com/tbrd_classic_top.html)
$1300 -- New Front Mount Intercooler Kit (http://www.magnumpowers.com/tbrd_itrclr.html)
$350 -- High Flow Fuel Injectors, Set of 6 42lb/hr (http://www.supercoupeperformance.com)
$480 -- Forged pistons for Thunderbird Super Coupe (http://www.moranav6racing.com/)
$300 -- FORGED RODS (http://www.moranav6racing.com/)
$2350 -- 3.8L Thunderbird SC Performance Heads (http://www.apten-us.com/performance/tbirdsc/scheads.asp)
$225 -- 3.8L 1.73 Roller Rocker Kit (http://www.apten-us.com/performance/tbirdsc/rockers.asp)
$195 -- Complete Engine Gasket Set (http://www.supercoupeperformance.com)
$165 -- 3.5" Diameter Intake Tube (http://www.magnumpowers.com/tbrd_intake_tube.html)
$499 -- High Performance Intake Plenum (http://www.magnumpowers.com/tbrd_plenum.html)
$250 -- Pro-M 87mm Bullet Chrome Mass Air Flow Sensor (http://www.supercoupeperformance.com/Prom87.htm)
$350 -- 85mm Throttle Body (http://www.magnumpowers.com/tbrd_thrttl.html)
$360 -- B-H-J Billet Steel Harmonic Balancer (http://www.supercoupeperformance.com/BHJ Pics.htm)
$170 -- ASP SC underdrive pulley set (http://www.bluetonguemotorsports.com/ESMParts/ASPSCUnderdrive.html)
$615 -- Griffin High Capacity All Aluminum Radiators (http://www.supercoupeperformance.com/Griffin Rad Pics.htm)
$15 -- High Performance Thermostats (http://www.supercoupeperformance.com)
$15 -- SCP Pressure Release Radiator Caps (http://www.supercoupeperformance.com)
$135 -- SCP High Flow Fuel Pumps (http://www.supercoupeperformance.com/190 LPH Pump pic.jpg)
$85 -- Billet Adjustable Fuel Pressure Regulator (http://www.supercoupeperformance.com)
$85 -- SC 8 Rib 5% Billet Aluminum Supercharger Pulley (http://www.bluetonguemotorsports.com/ESMParts/SCSolid5percentBlowerPulley.html)
$1390 -- "No Wait MagnaPort II" Blowers (http://www.magnumpowers.com/tbrd_blwr_ser.html#blr_ser_nowait)
$330 -- Raised Classic Top (http://www.magnumpowers.com/tbrd_classic_top.html)
$1300 -- New Front Mount Intercooler Kit (http://www.magnumpowers.com/tbrd_itrclr.html)
$350 -- High Flow Fuel Injectors, Set of 6 42lb/hr (http://www.supercoupeperformance.com)