Ok for suspension i would go to either steeda or saleen or maximum motor sports and buy there complete road racing kit.
I would get a built 9 inch for a Fox mustang from strange engineering with 3.73 gears. remember since this is a road race car you do not want a spool you need a limited slip diff.
The car would have to be stiff so a 12 point roll cage would be a must.
Also a sub frame brace kit would be in order.
Light wieght also so don't forget about fiberglass doors hatch hood and fenders.
Lexan glass would have to be installed instead of the factory glass.
The tranny would be a tko 600 close ratio
aluminum drive shaft.
for engine maybe go here and look at the xr long blocks
http://www.dssracing.com/
don't forget all the safety equipment.
sfi scater shield
sfi tranny shield
sfi fire supression equipment
race suits helmets boots
maybe a body widening kit so you can get wide tires under the fenders.