I went a similar yet different route as wilbur. Some of the modifications I made. The list does not include the body mods.
I hope the picture links work.
Engine
Tune Port Injected L98 – rebuilt 0.30 over; Vortec heads – roller rockers; “hot” cam; Doug’s headers with Serma coat; High performance chip from Street & Performance; Street & Performance TPI wiring harness; Polished TPI with Siamese runners; Throttle body enlarged to 52 mm; Custom air filter; Custom stainless fuel injection gas tank with in-tank pump; Cool Craft triple flow radiator with shroud and spal electric fan
Transmission
700 R4 – rebuilt with shift kit; 2100 stall converter;
Third Member
10 bolt – rebuilt; Narrowed; 3.42 gears; T/A rear end support cover
Chassis/Suspension
1973 Firebird front clip; QA1 adjustable coil over shocks; Quick ratio steering box; Slotted rotors front; Rear disc brake kit; Large front anti-sway bar; Rear anti-sway bar; Shackle-less rear leaf suspension (Full Tilt Street Rod slider system); ShockWave 9000 airbags
http://i163.photobucket.com/albums/t299/jimbob1957/02_03_5.jpg http://i163.photobucket.com/albums/t299/jimbob1957/02_03_9.jpg http://i163.photobucket.com/albums/t299/jimbob1957/02_03_3.jpg http://i163.photobucket.com/albums/t299/jimbob1957/03_06_2.jpg
