vortec heads q? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

useRc10 · 09-12-2002, 06:27 PM

will the vortec heads off of a new truck work on my 350? I see lots of them off of teh new 5.3 Ls and was wondering if tehy will fit...
thanks, -Nick

Project1970 · 09-12-2002, 08:17 PM

Nope - the Vortecs in the new style of trucks (the Silverado bodystyle, 1998 and newer) are a completely different engine. The 4.8, 5.3, and 6.0 V8's are all based off of the LS1/LS6 found in the 1997 and newer Corvettes, and 1998-2002 F-Bodies. Completely different block, not even close.

68_GMC_910 · 09-12-2002, 08:27 PM

but the ones off of Vortec 5.7s from the pre-99 trucks will fit, but require a new intake manifold... or drill/tap the heads...

good design... almost as good as an LT1...

Project1970 · 09-12-2002, 08:51 PM

Yup, I've got them on my truck. They rock hard, heh. You can't put LT1 heads on a GenI block, though (reverse coolant flow) and they outflow the far more expensive aluminum L98 heads if you want to stick all GM.

68_GMC_910 · 09-12-2002, 09:10 PM

yeah, I know... if the LT1 heads would fit I'd be out right now prying them off of a Camaro... *lol*

oh, I should have mentioned valve covers... you'll need center bolt valve covers with Vortec heads, I think...

Project1970 · 09-12-2002, 09:15 PM

Yep, you'll need centerbolt valvecovers (which are much better than the original ones imo) and you also can't use the factory A/C bracket that goes to the intake manifold.

I still haven't figured out how I'm going to mount the A/C once I get headers, though. Right now, it's mostly on the exhaust manifold mount.

nate68 · 09-12-2002, 10:12 PM

alan grove has the a/c brackets that work with vortec heads

Longhorn Man · 09-12-2002, 10:29 PM

Don't forget guided rockers...you'll need them too.

Woody · 09-13-2002, 09:00 AM

nate68,

Hey got any more info on the a/c brackets from alan grove?
Price? Work with stock compressors? Pics?

deadmeat521 · 09-13-2002, 09:30 AM

also if you want a big cam go with lt4 valve springs the stock can go up to .450 lift and you do need a n intake for them and i love my vortecs

Project1970 · 09-13-2002, 02:41 PM

Quote:

Originally posted by deadmeat521
also if you want a big cam go with lt4 valve springs the stock can go up to .450 lift and you do need a n intake for them and i love my vortecs

...LT4 valvesprings fit? That's probably a lot cheaper than getting the heads machined for stock-size springs, too...

deadmeat521 · 09-13-2002, 04:48 PM

no they do have to be machined but you get a set with the springs already installed from sdpc2000.com

Project1970 · 09-13-2002, 10:01 PM

Eh? Is it an option or do they do it to all of them? I got my Vortec head kit from SDPC...great deal, I should add...I know I didn't specify any stronger springs, so my guess is I don't...but that's cool that LT4 ones fit!

deadmeat521 · 09-13-2002, 10:07 PM

thats what pissed me off they started offering the upgrade a week after i got mine and yes they still offer it for 900 or just the springs for 250 i think. they also offer upgraded heads and edlbrock air gap intake for a little over 1000

nate68 · 09-14-2002, 08:44 PM

www.alangrovecomponents.com

i'm running a sanden compressor (cuz the A6 stock ones suck and they drag down your motor bad) on the driver's side. they make em for both sides. they come with all the spacers n stuff

09-12-2002, 06:27 PM	#1
useRc10 Registered User Join Date: Feb 2001 Location: Mechanicsville, VA, 23111 Posts: 1,138	vortec heads q? will the vortec heads off of a new truck work on my 350? I see lots of them off of teh new 5.3 Ls and was wondering if tehy will fit... thanks, -Nick __________________ -'02 Chevy Avalanche, 5.3L, 4x4... needing a small lift and bigger tires -'72 Chevy C-10(350, bored 60 over)dual flowmasters, 3 on the tree -'85 K5 Blazer,305 NO MORE...350 is in,2" lift,33" Mickey Thompson Baja Claw Radials -dads '70 burb (red, 5-7 drop, 350...) www.geocities.com/userc10/truckhome.html AIM: Auntjoedadda

09-12-2002, 08:17 PM	#2
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Nope - the Vortecs in the new style of trucks (the Silverado bodystyle, 1998 and newer) are a completely different engine. The 4.8, 5.3, and 6.0 V8's are all based off of the LS1/LS6 found in the 1997 and newer Corvettes, and 1998-2002 F-Bodies. Completely different block, not even close. __________________ Project1970 - LS1 Swap Complete!

09-12-2002, 08:27 PM	#3
68_GMC_910 what would Neal do? Join Date: Sep 2002 Location: Winnipeg, Manitoba, Canada Posts: 150	but the ones off of Vortec 5.7s from the pre-99 trucks will fit, but require a new intake manifold... or drill/tap the heads... good design... almost as good as an LT1... __________________ 1968 GMC 910 Long Step 250/3onTree 1969 Chevy C10 longfleet, 350/350

09-12-2002, 08:51 PM	#4
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Yup, I've got them on my truck. They rock hard, heh. You can't put LT1 heads on a GenI block, though (reverse coolant flow) and they outflow the far more expensive aluminum L98 heads if you want to stick all GM. __________________ Project1970 - LS1 Swap Complete!

09-12-2002, 09:10 PM	#5
68_GMC_910 what would Neal do? Join Date: Sep 2002 Location: Winnipeg, Manitoba, Canada Posts: 150	yeah, I know... if the LT1 heads would fit I'd be out right now prying them off of a Camaro... lol oh, I should have mentioned valve covers... you'll need center bolt valve covers with Vortec heads, I think... __________________ 1968 GMC 910 Long Step 250/3onTree 1969 Chevy C10 longfleet, 350/350

09-12-2002, 09:15 PM	#6
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Yep, you'll need centerbolt valvecovers (which are much better than the original ones imo) and you also can't use the factory A/C bracket that goes to the intake manifold. I still haven't figured out how I'm going to mount the A/C once I get headers, though. Right now, it's mostly on the exhaust manifold mount. __________________ Project1970 - LS1 Swap Complete!

09-12-2002, 10:12 PM	#7
nate68 Registered User Join Date: Jan 2000 Location: ca Posts: 1,110	alan grove has the a/c brackets that work with vortec heads __________________ 68 short step, 406/700r4, 9" w/discs.

09-12-2002, 10:29 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Don't forget guided rockers...you'll need them too.

09-13-2002, 09:00 AM	#9
Woody Registered User Join Date: Feb 2000 Location: Georgetown, KY, USA Posts: 631	nate68, Hey got any more info on the a/c brackets from alan grove? Price? Work with stock compressors? Pics?

09-13-2002, 09:30 AM	#10
deadmeat521 Registered User Join Date: Sep 2002 Location: pasadena,tx Posts: 31	also if you want a big cam go with lt4 valve springs the stock can go up to .450 lift and you do need a n intake for them and i love my vortecs __________________ 72 pickup:vortec heads,msd ignition,& m22 rock crusher

09-13-2002, 04:48 PM	#12
deadmeat521 Registered User Join Date: Sep 2002 Location: pasadena,tx Posts: 31	no they do have to be machined but you get a set with the springs already installed from sdpc2000.com __________________ 72 pickup:vortec heads,msd ignition,& m22 rock crusher

09-13-2002, 10:01 PM	#13
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Eh? Is it an option or do they do it to all of them? I got my Vortec head kit from SDPC...great deal, I should add...I know I didn't specify any stronger springs, so my guess is I don't...but that's cool that LT4 ones fit! __________________ Project1970 - LS1 Swap Complete!

09-13-2002, 10:07 PM	#14
deadmeat521 Registered User Join Date: Sep 2002 Location: pasadena,tx Posts: 31	thats what pissed me off they started offering the upgrade a week after i got mine and yes they still offer it for 900 or just the springs for 250 i think. they also offer upgraded heads and edlbrock air gap intake for a little over 1000 __________________ 72 pickup:vortec heads,msd ignition,& m22 rock crusher

09-14-2002, 08:44 PM	#15
nate68 Registered User Join Date: Jan 2000 Location: ca Posts: 1,110	www.alangrovecomponents.com i'm running a sanden compressor (cuz the A6 stock ones suck and they drag down your motor bad) on the driver's side. they make em for both sides. they come with all the spacers n stuff __________________ 68 short step, 406/700r4, 9" w/discs.

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