Here is some engine weights to help you out.
http://www.bacomatic.org/~dw/txt/engfyi.htmThe frame alone weighs 600 lbs. Its not easy to get under 2400 without gutting it. I will post what I can out of the Performance Fiero's book by Robert (Greg) Wagner (think main page car). You can pick it up here.
http://www.fierodave.com/All weights are in lbs.
front engine mount - 2.8
glass sunroof - 14.3
fiero jack - 6.8
Spare - 29.8
Muncie 4 speed - with oil 89.2 - without 85.4
Getrag - with 98 - without - 94.2
Swaybar front - .9" dia 10.2 - 1" dia 12.4
V6 stock flywheel - 15
205/60-14 on stock fiero rims - 32.4 each
standard fiero seat, cloth - 32.8 each
y pipe with Egr and heat shield - 8.5
Steering stabilizer shock - 2
Trunk carpet - 5.6
Radiator fan - 6.2
engine blower (in trunk) - 3
wiper motor - 3.5
rear brake caliper (without pads) - 7.8 each
front rotor, hub, brake caliper, pads - 32.5 each side
Headlight buckets and motors - 6.2 each
intake manifold - 27.5
head with valve springs - 31.5 each
block (as published by GM) - 106
starter - 12.5
Engine long block - 302
exhaust manifold - 2.8 each
distributor - 2.3
throttle body and coolant lines - ~3
fuel rail and injectors - ~3.8
clutch and pressure plate - ~14.1
valve covers - ~2.3 each
ignition coil - ~1.5
Batteries can weigh anywhere from 12 (super light weight) to 45 (optima yellow top, ect)
Gallon of gas - ~6.3
Gallon of oil - ~7.4
Gallon of water - ~8.33
Gallon of antifreeze - 9.35
Good luck on your search. Hope this helps some. I would love to know how much the interior weighs (dash, carpet, ect)
I will be watching to see what others come up with also.
[This message has been edited by Fieroseverywhere (edited 05-08-2007).]