Motor experts, can I get a few opinions on this build please.

[trevor73402]

Hey all,

I'd like to get some opinions on this motor build from you all. I am not a "pro" when it comes to stuff like this so any help or advice would be appreciated. If this is way overkill for my application please say so.

Im about to have my transmission rebuilt (700R4) on Friday. A new motor will be on the list next in line. The current TBI 350 has a deep knock in it and also has 171,000 miles on it. The vehicle in question is a 1990 K5.

Ive really wanted to do a LS swap into the K5. However I think this might be a bit above my level of ability as far as being able to do it easily. Im sure I could get it eventually and im still not ruling it out totally. Ive come across this motor for sale locally. It is complete on the stand, ready to go. Here is the run-down on the build as follows:

All Factory new/Zero miles

New 350 GM block
GM Cast Pistons, rings, balancer, and cast crank
Street & Performance Tall TPI unit
Complete Street & Performance Plug & Play Wiring Harness with factory GM ECM flashed to operate the TPI system
Edlebrock aluminum Performer Heads
Show Chrome valve covers-center bolt style
Chrome swivel water neck
K&N Filter
MSD Pro Billet Plug & Play Distributor
All GM Sensors included
Comp Cams HR 258 Roller Cam
Billet Timing set
Aluminum Timing set cover
Comp Cams Gold Series 1.5 Self Aligning Roller Rockers
Comp Cams Push Rods
ARP head bolts
ARP oil pump shaft
Eagle I beam rods
Felpro Gaskets for everything
Entire motor assembly profesionally balanced at reputable Hot Rod shop.

Ok, whats your opinions? The guy claims this set up is very driveable/Streetable with what should be excellent reliability producing somewhere around 400hp+. He is firm on the price at $4000, although I think I might work him down another couple hundred dollars.
Im seeing complete LS motors (5.3 & 6.0) with harness for around $1500-$2000 on craigslist. These typically have 50,000-100,000 miles on them. As we all know, this isnt the only cost though when doing to the LS swap. So, am I better off with a all factory new easy drop-in plug & play 350 with the TPI, or just hold out and try to do a used LS swap eventually?

This again is for a K5, that will be daily driven to and from work about 15-20 miles a day. Light off-road use on the deer lease and mountain trails. Nothing radical. It will have a 4" lift, 35" tires, 4.56 gears with 10 bolt axles.