The biggest restrictors on the TBI engine are TBI unit, intake manifold,
heads and cam...Nothing major...hehe...he...

   Get the Edelbrock performer Multi-Point EFI System(PN 3502). It uses
your stripped down TBI unit. You will need some fuel line mods and a new
fuel pump, but the gains are worth the work and cost. A CompCams Xtreme 4x4
cam/lifters(PN CL12-235-2) is a good choice for a cam(even with the factory
TBI). A set of World Products S/R Torquer heads(PN 042770-1) would bring
everything together(cam and MPFI). You will definatly need a custom PROM
before this point. A set of headers, high flow CAT, and 3inch single exhaust
with a high flow muffler would allow everything to reach its full potential.

Before the exhaust, the scales will tip past $2000, but its all something
that can be done in your driveway with the engine still under the hood. The
MPFI would be the first, cam and custom PROM second, then heads and exhaust
with a new custom PROM programming.

put a supercharger on it ...

try some basic tune up items first...platinum plugs high quality wires,
cap, rotor....try a throttle body spacer...open up your exhaust, hi
flow cats, larger diameter dual exhaust...if you don't want to make
alot of noise,Magnaflow makes some nice hi flow mufflers that are more
bite than bark...try bumping your base timing up a few degrees...i run
mine at 6 on an 89 chev 4x4...go to a local repair shop and see if they
have a motor vac machine[goto www.motorvac.com for more info] it's well
worth the money in fuel savings and performance.

Greetings,

First let's go on the presumption that your engine is in good condition and
as near stock performance as good maintenance will keep it.  Maybe you
should be looking for the reason why you feel it isn't giving you the HP you
want before throwing money at the motor.  In '92 I believe the 350 with TBI
put out about 210hp at sea level, but as we all know you lose a certain
percentage of power as you gain altitude due to the thinner air so at 8000'
you're starting out at a loss.

At 65 with normal load (not towing or climbing a hill) you probably are
turning about 2200-2500 rpm in overdrive.  This is not the "sweet spot" for
power from that motor so maybe you should be thinking about dropping out of
OD and into Drive (or out of 5th and into 4th if you have a manual) and
letting the motor spin a little faster where it makes more power.  It'll
drink more gas but 2800-3000 rpm won't hurt the motor when cruising.

Are you running oversize tires?  If you are, then this may also be a reason
why your motor feels anemic as oversized rubber changes your final drive
ratio and makes the motor spin slower for the same speed.  In addition, what
is your rear axle ratio?  A higher numerical ratio (like 3.73 or 4.10:1)
will decrease your mpg on the highway but will give you a feeling of more
power because your motor will be spinning where it makes more power.  A
lower ratio (like 3.08 or 3.42:1) will get you better mpg on the highway
because your motor is turning slower but you sacrifice power and towing.
Perhaps what you are experiencing is nothing more than a gearing issue,
especially if this truck was meant more for the flatlands than the mountains
when it was put together.

The basic rule of generating more power is "Air In/Air Out".  Intake and
exhaust mods are always popular, but if you really want to cram the air into
the cylinders (especially at high altitudes) then you should be thinking
something like a turbocharger or some type of blower down the line along
with whatever else you want to do.

Cheers - Jonathan