engine/trans value...?

[sLoWnStEaDy]

Thinking about selling my current engine/trans to go with an LS/4L80E. But, I'be never really sold a complete engine/trans and don't know anything about the value. I know there's about $12k+ in it but that don't mean shit. So, what would be a fair price if I sell it?

Engine:
388 (factory, 4-bolt main block)
12.8:1 compression
ARP studs everywherd
Scat forged rods
Scat forged crank
Mahle forged pistons
don't remember cam specs off hand
P&P'd Dart iron eagle heads (2.02/1.60)
Comp roller rockers
PP single plain, high rise intake (port matched)
Quick Fuel, 1050cfm, E85 carb
Kevko deep oil pan
HV oil pump
MSD 6AL
MSD Pro billet distributor
MSD wires and NGK plugs
Holley fuel pump and adjustable pressure regulator

Trans:
TH350
TCI manual valve body
Kevlar clutches
2800-3200 stall B&M torque converter
B&M Quick Silver shifter
other mods but not 100% sure what


Engine made 640/570, I'll have to throw it on a dyno chassis... Don't have the build/dyno sheets any more but there's a chassis dyno 10~ miles from my house. Thinking I need a turbo LS/4L80E and I know I'm pushing the block already so I've never touched the nitrous.

Also have a G-body 10-bolt, 4.11 posi rear I''ll be selling as soon as my 4.10/8.8" is ready to go. Figure that might be worth $300?

[sLoWnStEaDy]

Not being able to edit/delete you own threads is really fucking annoying. Not sure how this posted twice, someone feel free to delete one of them.

[AutoMods]

unlimited editing time now, just changed it