hey guys. i have a very nice 1991 gmc 1500 i bought the truck with a 350. i knew everyone who has owned it. this was the 3rd engin it had. i blew this one up. i just got a hell of a deal. or so im thinking on a 6.5L GM. $900 for the motor and wireing harness and all that stuff. it does not have a turbo. i want to know if this motor will still have enough power when hooked up to a 5 speed manual tranny to get out in the mud and be able to spin the tires with out dogging out? if not what can i do for power chip stuff for it?

what 5 speed trans is in the truck now,
what year motor and more important what injector pump is on the engine db2/db4 if db2 no chip is required as no electronics on the engine.
if it is a stock 1500 you will need to upgrade the front suspension (springs) for the extreme weight increase of the diesel engine.
you will need to install a 2nd battery.
as for spinning the tires remember a diesel and particurally the 6.5 is a low rpm engine it is a torquer generaly do not exceede 3500 rpm and definatly do not exceed 4000 rpm or you will have a whole lot of parts on the ground.

im not sure what the tranny is it a is a 5 speed that was hoked up to a 350. it has heavy duty clutch system. the motor is a 1995. its out of a cargo van. and the springs are all changed to 3/4 ton.

ok on springs
but check the injection pump there will be a label on it with the number.
as for a turbo they can be had including exhaust manifolds and the associated parts.
you need to find out what trans is in the truck as most gasser trannys will not survive a diesiels torque.
nv4500/nv4600 are generally diesel
wes

Really need to know if the tranny is an NV3500 or 4500 to determine how well it will hold up to the 6.5. Is the truck a C or K 1500? Even if the suspension wasn't upgraded, there'd be no need to. The 6.5 is a high speed Diesel, don't lug it.

the truck is a gmc sierra. regular cab and short bed stepside. im not sure if it was a c or k. and the tranny will hold up to the power the mechanis i bought the truck off said.

For the C/K thing...
C= two wheel drive
K= four wheel drive

ok its a k then. its four wheele drive

hey guys. i got the motor putting it in is going great. im 16 this is the biggest thing iv done ever and its going to take less then a month well im working full time to. got one more question on this swap. the motor came out of a van that was an automatic. i am hooking in to the standerd tranny. do i need to get a new computer for it or will the old one stil work just fine without it being hooked up to all the wires?

Is the 95 van an electric or mechanical injection pump? Does it have electronics on it or just a throttle cable?

If it just has a throttle cable you will not necessarily need a computer at all.

it has just a cable i believe. i didnt see any electronics to the pump

so that's a DB2, mechanical pump.
Is that the same than the pic ? 90595