What would you do?
Need some help on which way to go, complete newb here - this will be a duly driver for me 2-3x a week.
I picked up a ‘68 C10 that has a LS swap from a 2001 Tahoe - he used everything from that vehicle. Engine, tranny, driveshaft and rear end (he did upgrade the gears to 3.73 with LSD, think it is a 10 bolt from that research I can find), etc.
My research says it is a LM7 iron block rated at 285hp stock (I assume to the fly). I would like to wake this up and get 400whp maybe 500whp downline. I believe the 4L60e with a cooler, shift kit, servo and converter with hold that power (might be a gamble, but I am okay pushing that some for price point). I may need to update the stock radiator too?l (not sure there)??
I have been talking with a tuner with a good reputation in the Temple, TX area.
He is pushing the single turbo with an intercooler to get me where I want to be. I haven’t seen a quote yet, but he says his supplier was offering a 76mm turbo and intercooler for like $1K. Reading forums, it looks like I will need new studs, intake gasket, harden push rods, a westgate, possibly a cam and injectors.
I have looked at NA builds online - cam, heads, intake, headers will probably get me to where I was shooting for too.
I assume the costs would be pretty similar. Both seem pretty reliable since the turbo would be are pretty low boost for those numbers from what I can see.
Any suggestions from the members here on which way you would go? Anything else I am missing?
Thanks in advance for suggestions.
What wheels, tires, brakes & suspension are on the truck currently? Often with 1960's & 1970's era cars or trucks all of that needs upgraded before adding lots of power. Doesn't have to be massive upgrades, power steering, power disc brakes, good shocks, disc brakes & well matched sway bars can work magic if your C10 doesn't already have etc.
After all of that, I'd look at the turbo set up & plan for a built transmission if you think want 400+ whp to 500+ whp with great driveablity & reliability.
I'd skip trying to do a driver NA build with 500whp being mentioned with a 5.3 unless you're up for spraying it.
Last edited by 99 Black Bird T/A; Nov 27, 2022 at 01:28 PM.
yeah, it has front disc, back drums, Nitto NT05s, bagged suspension with schrader valves, power steering and tilt column, A/C, Dakota digital gauges, new head unit with okay-ish 6x9s, and relocated rear fuel tank.
the guy did a pretty good job on it, and I have driven it some, definitely want more from it, why I am here.
Oh forgot to mention I will be running 93 octane on the original post too.
What wheels, tires, brakes & suspension are on the truck currently? Often with 1960's & 1970's era cars or trucks all of that needs upgraded before adding lots of power. Doesn't have to be massive upgrades, power steering, power disc brakes, good shocks, disc brakes & well matched sway bars can work magic if your C10 doesn't already have etc.
After all of that, I'd look at the turbo set up & plan for a built transmission if you think want 400+ whp to 500+ whp with great driveablity & reliability.
I'd skip trying to do a driver NA build with 500whp being mentioned with a 5.3 unless you're up for spraying it.
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What wheels, tires, brakes & suspension are on the truck currently? Often with 1960's & 1970's era cars or trucks all of that needs upgraded before adding lots of power. Doesn't have to be massive upgrades, power steering, power disc brakes, good shocks, disc brakes & well matched sway bars can work magic if your C10 doesn't already have etc.
After all of that, I'd look at the turbo set up & plan for a built transmission if you think want 400+ whp to 500+ whp with great driveablity & reliability.
I'd skip trying to do a driver NA build with 500whp being mentioned with a 5.3 unless you're up for spraying it.
I have a very expensive built 5.3, and it does not put down the numbers that you are looking at. It is fun to drive, but it is in a 3000 lbs car. That 4L60E is a ticking time bomb at the power levels you want without being properly built. I personally run a Performabuilt Level 2, but there are many good vendors on the forums.
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I just like to be informative so a person can make an educated decision.Also: For anything over 400 RWHP and trying to keep on budget, I'd get rid of that 4L60E and install a 4L80E. You can do a budget build of a 4L80E that will support 1000HP, there's nothing cheap about a 4L60E that can do the same.
can you provide any content on the budget build on the 80e? Everything I have seen looks like some work, new driveshaft, support, wiring, new converter, shift kit, retune, etc
been debating this route in leu of the 60e not making it vs buying something like beefed up 60e and keeping my same tune, driveshaft and converter.
I just like to be informative so a person can make an educated decision.Also: For anything over 400 RWHP and trying to keep on budget, I'd get rid of that 4L60E and install a 4L80E. You can do a budget build of a 4L80E that will support 1000HP, there's nothing cheap about a 4L60E that can do the same.
Need some help on which way to go, complete newb here - this will be a duly driver for me 2-3x a week.
I picked up a ‘68 C10 that has a LS swap from a 2001 Tahoe - he used everything from that vehicle. Engine, tranny, driveshaft and rear end (he did upgrade the gears to 3.73 with LSD, think it is a 10 bolt from that research I can find), etc.
My research says it is a LM7 iron block rated at 285hp stock (I assume to the fly). I would like to wake this up and get 400whp maybe 500whp downline. I believe the 4L60e with a cooler, shift kit, servo and converter with hold that power (might be a gamble, but I am okay pushing that some for price point). I may need to update the stock radiator too?l (not sure there)??
I have been talking with a tuner with a good reputation in the Temple, TX area.
He is pushing the single turbo with an intercooler to get me where I want to be. I haven’t seen a quote yet, but he says his supplier was offering a 76mm turbo and intercooler for like $1K. Reading forums, it looks like I will need new studs, intake gasket, harden push rods, a westgate, possibly a cam and injectors.
I have looked at NA builds online - cam, heads, intake, headers will probably get me to where I was shooting for too.
I assume the costs would be pretty similar. Both seem pretty reliable since the turbo would be are pretty low boost for those numbers from what I can see.
Any suggestions from the members here on which way you would go? Anything else I am missing?
Thanks in advance for suggestions.

Last edited by grinder11; Nov 30, 2022 at 02:28 PM.








