Heads - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DanoDMano · 11-19-2003, 02:46 AM

Will 1990 heads work on a 1970 sb 350??

jhow66 · 11-19-2003, 02:04 PM

Will work but you will need a manifold to fit the vortec heads.

*67Fleetsidedream* · 11-19-2003, 02:10 PM

Yep it will and yes you will need a intake manifold that fits to Vortec heads. You may need to get some headers or exhaust manifolds for them to....

70c10 · 11-19-2003, 02:35 PM

I thought Vortec heads came out in 95' or 96'.

lukecp · 11-19-2003, 03:22 PM

70c10 is right....Vortec's were first used in '96.

If they are '90 model heads, they aren't vortecs. The intake is still different than the old style '55-'86 SBC though....you will need a special carb'd intake manifold for the '87-'95 heads. I *think* edelbrock makes one, if not if you search junkyards enough, some old Chevy cop cars had the late model heads, and a factory allumium 4-bbl intake. My friend had such an intake on a '76 C10 with a '89 305 in it.

BTW, you will also need centerbolt valve covers, and your current exhaust will bolt right up. You might need self-alliging rocker arms too, but i'm not sure completely on that

DanoDMano · 11-19-2003, 03:57 PM

Thanks for the feedback. I was facing either rebuilding my heads or finding a newly rebuilt set. I sent mine to the machine shop today to get a new grind, guides and hardened seats!!

There is a guy on the 88-98 board selling a set of freshly rebuilt 1990 heads for $240 to your door. Thought it was a good price, but I already havce a new intake for our style heads..

Thanks again!!

73stepside · 11-19-2003, 08:48 PM

you don't need self aligning rockers if you put guide plates in. the 2 center bolt holes are at a different angle then the old heads but all that takes to cure is a little creative grinding/drilling

68c10owner · 11-20-2003, 05:12 AM

don`t but those heads. the intake port necks down from stock size to really small. save your money and buy some vortec heads. should be able to find a set for around $175-$200. i think they are only about $450 per pair new. they are a great head.

11-19-2003, 02:46 AM	#1
DanoDMano Pronounced "Pew-al-up" Join Date: Oct 2002 Location: Puyallup, Washington Posts: 845	Heads Will 1990 heads work on a 1970 sb 350?? __________________ Classic GM Trucks of Washington Club Member 1970 FS chevy,350/350, Edelbrock cam and intake. Holley 650 carb,HEI,AT,Tangier Orange, 18's, Power Locks, Truck Photos

11-19-2003, 02:04 PM	#2
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Will work but you will need a manifold to fit the vortec heads. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

11-19-2003, 02:35 PM	#4
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	I thought Vortec heads came out in 95' or 96'. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

11-19-2003, 03:22 PM	#5
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	70c10 is right....Vortec's were first used in '96. If they are '90 model heads, they aren't vortecs. The intake is still different than the old style '55-'86 SBC though....you will need a special carb'd intake manifold for the '87-'95 heads. I think edelbrock makes one, if not if you search junkyards enough, some old Chevy cop cars had the late model heads, and a factory allumium 4-bbl intake. My friend had such an intake on a '76 C10 with a '89 305 in it. BTW, you will also need centerbolt valve covers, and your current exhaust will bolt right up. You might need self-alliging rocker arms too, but i'm not sure completely on that __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

11-19-2003, 03:57 PM	#6
DanoDMano Pronounced "Pew-al-up" Join Date: Oct 2002 Location: Puyallup, Washington Posts: 845	Thanks for the feedback. I was facing either rebuilding my heads or finding a newly rebuilt set. I sent mine to the machine shop today to get a new grind, guides and hardened seats!! There is a guy on the 88-98 board selling a set of freshly rebuilt 1990 heads for $240 to your door. Thought it was a good price, but I already havce a new intake for our style heads.. Thanks again!! __________________ Classic GM Trucks of Washington Club Member 1970 FS chevy,350/350, Edelbrock cam and intake. Holley 650 carb,HEI,AT,Tangier Orange, 18's, Power Locks, Truck Photos

11-19-2003, 02:10 PM	#3
67Fleetsidedream Wiseass secured himself a BAN Join Date: Nov 2000 Location: MOON!!! Posts: 2,282	Yep it will and yes you will need a intake manifold that fits to Vortec heads. You may need to get some headers or exhaust manifolds for them to....

11-19-2003, 08:48 PM	#7
73stepside Registered User Join Date: Feb 2002 Location: Moore OK 73160 Posts: 974	you don't need self aligning rockers if you put guide plates in. the 2 center bolt holes are at a different angle then the old heads but all that takes to cure is a little creative grinding/drilling __________________ 04 GMC Sierra RCSS 70 CST LWB 04 HD Sportster 1200 Custom

11-20-2003, 05:12 AM	#8
68c10owner Registered User Join Date: Oct 2003 Location: Carmichael, California Posts: 3,006	don`t but those heads. the intake port necks down from stock size to really small. save your money and buy some vortec heads. should be able to find a set for around $175-$200. i think they are only about $450 per pair new. they are a great head. __________________ Anthony



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.