427 or 6.0

[okieraptor]

What do you guys think. 427 tall block/4l80 or throw in a 6.0 fi/4l80?

Already have the 427 but all these 6.0 swaps make me want one of these. Either way ill be dropin in the 4l80. It will be mostly a weekend/cruz night truck. Might drive it to work every now and then. Either way I wand at least 450hp out of it.

What do ya think?

[gchemist]

427!!! Nothing but cubic inches of Detroit muscle!! Now if you have to build the 427 to 450 HP, you might be better off with the 6.0. A few parts will get you to 450 HP either with a carb or FI.

[thepenguin99]

imo big block if it is going to be more of a toy than daily transportation.

[N2TRUX]

LSx is the only way to go. Throw a cam, intake and heads on the 6.0 and you are at 500 hp/tq . What more do you need?

[Gregs71]

The older i get, the more I like the reliability and power of modern fuel injection. Then again 427 sounds fast...

[85burb]

Do the 6.0 cam heads and intake and of course a tune and easy 500-550. dyno proven. http://www.hotrod.com/techarticles/e...est/index.html

[okieraptor]

Man the small cam made more power than I was planing. That's a beast.

Yes I will be building one or the other. The bb sit in my shop just a block.

It will be just a toy so I was leaning towrds the bb but those ls motor are make'n some powere with very few mods. Hmmm may have to get another truck and put the bb in the gray truck and ls swap in a shortwide.

[crm318]

If money and modification is not a problem, I think the 6.0 is the way to go. The 427 (tall deck) will only have low end grunt as where the 6.0 will have great torque and everything in between including milage.

[Jonboy]

I would vote 6.0 over a tall deck engine, too. If it wasn't a tall deck, that might be a different story. 6.0 with a few mods and a tune will be killer, though.

[STOCKISH]

Originally Posted by N2TRUX

LSx is the only way to go. Throw a cam, intake and heads on the 6.0 and you are at 500 hp/tq . What more do you need?

And 20 MPG on the highway to boot.

[fpjr0]

Originally Posted by 1972SuperCheyenne

And 20 MPG on the highway to boot.

x2

modern mpg, modern acceleration, older+modern=cool imo...

[69BBsuburban]

What's a 6.0?
I only know engines by their CUBIC INCHES.......haha.......
Too bad yer 427 wasn't a standard low deck.....build an L-88...
Gimme a GAS-GUZZLIN', carb'd big block over any FI "modern" throwaway engine.
FI doesn't give better reliabilty, just less maintainence....oh, and the ability to NOT be repaired along side the road when some electronic GIZMO decides it doesn't wanna play anymore....haha

[N2TRUX]

Originally Posted by 69BBsuburban

What's a 6.0?

The 6.0 is the midsize truck motor of the LSx family. It's the cast iron version of the 5.3 with a bigger bore. If you really want a bad boy start with a 6.2 and build from there.


There are Corvetttes running around with normally aspirated LS motors pulling 600hp and cruising with the a/c on using pump gas. Crazy stuff coming out of these motors with the proper tune.

[Puglia10]

where can i find more info on a 6.0 swap into a c10?

[tdiffee]

Originally Posted by 69BBsuburban

What's a 6.0?
I only know engines by their CUBIC INCHES.......haha.......
Too bad yer 427 wasn't a standard low deck.....build an L-88...
Gimme a GAS-GUZZLIN', carb'd big block over any FI "modern" throwaway engine.
FI doesn't give better reliabilty, just less maintainence....oh, and the ability to NOT be repaired along side the road when some electronic GIZMO decides it doesn't wanna play anymore....haha

I disagree that FI does not give better reliability when I start looking for a 6.0 for my swap I will be shopping on price not milage because these engines just don't wear out they are good for 300k or more miles I know a guy that owns a salvage yard and he told me that the only way he can sell a 5.3 or a 6.0 is a package deal for a swap because no one has to replace them in their dd's. You hardly ever see a carbed engine with over 100k on it. I also believe burability comes from they way they are started with FI you just start it and it idles at the normal rpm range but with a carbed engine they rev up as soon as they fire up and most people sit there revving them up until they are warmed up.

[okieraptor]

Well the 427 stays with the gray truck. Ol said no swap for the old girl. Buuuuut I am now looking for another truck for a swap. Junk yard here has a 5.3 now and says he will hold a 6.0 for me when he gets one in. So my titans for sale and the hunt is on for a 69-87 swb.

[BigBlocksRule]

Comparably built, the LS will kick the old big block's butt.
If you're going to go with a big block, sell that 427 crank and pick up a stroker. Cubes rule!!!

[Jim85IROC]

427 sounds impressive, but it's essentially a 454 with a napoleon complex. I'd rather the 6.0. Now if we're talking built 454 vs. built 6.0, then I guess it would depend on whether it's a 2wd or 4wd truck. For 2wd, I'd rather the lighter weight of the 6.0, but if it's a 4x4, the weight is irrelevant and I'd rather the torque of the 454.

[Pyrotechnic]

The tall deck 427 is just not worth the time, unless you plan to use only the block and make a wild stroker motor out of it.

The 6.0L is a good choice and will get decent gas mileage.

If you want some cubic inches, try the 2001 and up 8.1L (496) out of a 3/4 or 1 ton truck.

[GmtGmt]

keep the 427 make it wild
if you wanted something modern with mileage and reliability get a honda or toyota

[JEM]

If you're building a period-piece, you want the old-fashioned rod feel, build a big-block.

If you're building a driver, grab the 6.0.

Much less weight on the front wheels, far better accessories and bracketry, manifolding, etc. off the shelf, far easier to build to a modern standard of driveability.

[menace121978]

cool thread! i love hearing everyones opinion on this subject.

obviously i'd go with the new technology myself... i honestly believe that anyone who is voting for the old school big block hasnt had the opportunity to own or drive the new generation of muscle. i'll never go back

[69BBsuburban]

Originally Posted by menace121978

i honestly believe that anyone who is voting for the old school big block hasnt had the opportunity to own or drive the new generation of muscle. i'll never go back

I've driven BRAND NEW Corvettes, etc....
I still prefer the brute force and crudeness of my old jalopies....it's more than just the performance....there's a certain style and "coolness" factor no newer, plastic car can ever dublicate. Just my old school .02.....I'm an oddball

[okieraptor]

I agree the old just has that "coolness" to it. I forsee it as nothing less than a 496 when its all said and done. It will be just the cruzzer so load and lopy are deffenitly in the mix for it. I love the old skool but the way the new motors are proven them selves is making me like them A LOT!

On a side note my dad told me my uncle parked his 70 up on the hill to roat. So I will be paying him a visit in the next few days. I've tried buyin his truck since I was 15 so we'll see if he will finaly come off of it. It will get a 6.0/4l80 if I can get it.

[68GMCCustom]

6.0L or bigger LSx

the newer engines last longer because they are built better. for one thing...they have roller cam setups...a big difference over standard hydraulic lifter. The tolerances are different. etc.
The heads breathe like big block heads...providing lots of power in a smaller package.

oh...and here's mine...with the gen IV L92/LS3 style rectangular port heads...with huge 2.16 intake valves.