chewyman1

Hi guys, new to the site, so please don't burn me too hard if this has been discussed before. I'm going to be putting an LS & auto into a 67 chevelle & was wondering which is a better engine setup to go for. I've got the option to buy a complete drop out LS1 out of a 98 camaro with a 4l60E. Wiring, computer, motor & trans with 32K miles for $3500.00. I also have the option of purchasing a complete dropout 6.0L out of a 07 silverado 2500 with 12K miles & a 4l60E out of a 04 silverado 1500 with 5K miles, wiring, computer for $3000.00 (6.0 & trans is from a salvage yard). In the end, i'd like to have about 450 - 500 hp with really good street manners. I'm told the 5.7 is the 345 horse version & that the 6.0 is supposed to be good for about 325 horse. Which one will be easier to set down in a chevelle, which one will be cheapest or better to get those Horsepower numbers, etc. Basically, which is the better deal & which should I go for (all opinions welcome)
Thanks, Matt

kevin 67/6.0

There should not be a big diff they are about the same. I had a 6.0 it fit fine. then i swaped for a ls1. I wanted the ls1. I think with the write heads you can get more hp out of the 6.0. But i am not https://ls1tech.com/forums/conversio...hevelle-5.html

726.0chevelle

iTrader: (17)

i say go with the 6.0 they are rated around the same horsepower as the ls1 but they have less compression and smaller but still nearly the same power i would get a 4l80e rather than the 4l60e you gonna have to get a built 60e to hold 400 plus horsepower

olblue51

iTrader: (21)

If your not worried about weight, go with the 6.0. More displacement will be easier to make more power.

I don't think either one will be harder to install over the other... they are both LS engines. The main difference is the accessory drive and intake.

Also, the '98 LS1s are less desirable because of the electronics. The PCMs are not as advanced as the 99+ and you can't just swap PCMs because the wiring is different. There might be a few other differences with the '98 motors but I can't think of any off the top of my head.

6.0 motors are nice. They can easily be made to put out some great power with nice street manners. I was going to go 6.0 but with the direction my car is headed an LS1 was more fitting.

DrkPhx

iTrader: (15)

The 98 LS1 were rated at 305 hp with the WS6/SS rated slightly higher because of different exhaust and "ram air". Mine dyno'd 290rwhp bone stock. I would go with the 6.0 liter because of the better flowing heads, but it's an iron block compared aluminum for the LS1. Either can suit your goals, so it really comes down to you.

chewyman1

Is there going to be one or the other that has a better accessory drive for an A body? I'd like to keep the ac if possible & purchase as few relocation brackets as possible. (frame notching really isn't an option since I had my frame galvanized and welding on galvanized metal is deadly).

A_VAS

iTrader: (16)

I think the f-body engine will have the best accessories for your setup?...the truck stuff sits the alt up high and you might have clearance issues with the radiator as the pulleys are offset more forward from the engine....haven't done it but many on here have Abody swaps if you search around.
You can notch the frame with a cutoff wheel slightly if needed, as long as you don't go so deep that you need to weld in re-enforcement.

weight vs. displacement

JohnHF

iTrader: (5)

both motor/tranny pullouts you found are overpriced $$$

chewyman1

I was wondering if those were overpriced or not. What is a reasonable price for a complete pullout of a 6.0 or 5.7? Does anyone have a reasonable priced pullout setup for sale & how much? Thanks, Matt

ryanvv355

iTrader: (17)

I vote 6.0, too much hype associated with the LS1 being a Corvette engine, even though they are more commonly found in Camaros. That drives prices up.

Old Geezer

iTrader: (3)

Just bought an LQ4/4L60E, 15K.. <$2600.
I'd suggest getting an 03 or later, if you are going to use the 4L60. It has better planetaries, Vette servo....
Make sure the trans you get matches the engine. Some bell hsgs are different lengths, and different pattern match to the block.

chewyman1

Ok, I think I'm going to go with a 6.0. I have located one with 35000 miles on it complete drop out with wiring, computers, motor & trans. It's a 4l80e trans. It's a ls2 out of a trailblazer ss, so it's a 400hp version. They want $3200.00 shipped to my door. Is this a decent deal? I've been looking, and it seems to be a good deal from a salvage yard. most are running $4000+.
Matt

Old Geezer

iTrader: (3)

Snag it...
However, I think there are no 4L80's used in the TBSS.

chewyman1

Ok, my fault, I assumed (you know what they say) that it would be a 4L80, it's a rear wheel drive & not the AWD, so what would it be, a 4L70? Just curios. Any idea if the accessory setup will need significantly modified? And what would be the best motor mounts to use for this motor into a 67 chevelle frame?
Thanks, matt

philntx

iTrader: (8)

Keep in mind that the TBSS engine uses a front sump oil pan that you'll probably have to change.

chewyman1

I already had figured that i'd need a different pan with going to a 6.0. I have my eye on this one on ebay, item #260303985202. Has anyone ever delt with this oil pan or company, are claim that they are a gm pan, so it would be a good pan.

utahws6

iTrader: (11)

you could also just find ls6 combo might be a little more but lighter block than the 6.0 plus you'd have your pan and all ur acc. along with the 405 hp rating...

utahws6

iTrader: (11)

you'd still have to change ur pan...

Pop N Wood

iTrader: (1)

GM modified the oiling systems on the LS motors. That 98 was one of the early ones. They did something to improve the blocks also. The 98's are considered less desirable than even the later 2000-2001 motors for that reason.

The 4 inch bore on the 6.0 will support L92 heads, should you even want to go that route.

The truck motor may be rated at less HP, but there have been multiple car mag articles of them getting closer to 500 hp with just a cam.

71 chevelle

iTrader: (13)

I would recommend not to get that pan. On a body this pan is the best to use only if you will be running stock height. I have this pan for a 71 chevelle with a 6.0 its a bit low and will be changing it out for a autokraft. You can use it if your car will not be lowered. So far I am 2" lower than stock and I dont want to take a chance. I also have a new one that I was going to use in a 5.3 on a 69 chevelle. I will be selling shortly.

FYI I paid 1500 for a 2006 Escalade 6.0 and 4l60e with under 30k ecm and complete uncut harness.

If you have cash in hand you can pick up good deal right now.