Question bout cylinder heads - The 1947 - Present Chevrolet & GMC Truck Message Board Network

trinic · 10-18-2002, 09:48 AM

Question 1. Would the newer 96+ vortec heads fit on a 327 block? I know i'd have to purchase a new intake that'll accept the new heads and be able to use my Edelbrock. Question 2. Will these heads perform better than the the double hump heads I have now? I know this all comes down to how well the heads are worked, and what cam and other combonations are used, but was thinking about going to the new heads. I've heard great things bout them.....
Thx,

bigjimzlll · 10-18-2002, 10:48 AM

yes the vortecs will work, and they will work better than fuellies.. now having said that( I hate vortecs) it depends on what kind of performance your looking for?? just a daily driver that you want a little more punch from? vortecs are perfect for that..future improvements (needing more power) they dont lend them self to upgradeing on power. the vortecs will end up costing 750.00+.once you figure in intake..self aligning rockers..valve covers..spring upgrade.. for the same price you can get anyone of a number of aftermarket heads, that allow for more horses. It all depends on what the plan(future) of your build up is....

Mudder · 10-18-2002, 11:27 AM

I'm putting on a set of vortecs right now with roller rockers an air gap intake (edlbrock) and a new holley avenger offroad carb. Well see what happens in a couple of days.

Blazer1970 · 10-18-2002, 11:39 AM

Another nice thing about the Vortecs (or any other new head) is that the come "no-lead ready" with hardened valve seats.

mikep · 10-18-2002, 02:03 PM

I'll have to add in here that I have a set of world product S/R heads on mine. They are unleaded friendly, have guide plates and screw in rocker studs, extra thick decks and are supposed to flow as good or better than any chevy head that ever came in a car. Plus I paid around $400 total for the pair NIB and they fit all the old manifolds and accesories.

trinic · 10-18-2002, 02:21 PM

sounds like good info so far. i'll let you'll
know if i do the swap...

dmnall · 10-19-2002, 01:32 AM

I have a set of Fuelie heads on my 68 and if I were to actually buy another set of heads (I am thinking about upgrading when I have the cash), I would probably buy Edelbrock Etec 200 heads! Vortec based heads that actually out flow GM's Fast Burn Vortech Heads, have bigger Valves and Cost about $ 40 per head less then Fastburn!! Plus these heads will defintely outflow a Fuelie Heads!!

special70gmc · 10-19-2002, 08:02 PM

what about port +polishing i no it made a world of difference on my 400ex (quad) what are the gains plus who does it?

bigjimzlll · 10-19-2002, 09:59 PM

a bowl port job will add between 20-30 HP gasket matching and polishing maybe another 10. all of the HP gains will be in the upper rpm range...DO NOT port the vortecs, from what I understrand it makes them flow worse

nate68 · 10-19-2002, 10:13 PM

you can do work to the exhaust side and be ok but if you mess with the intake side; that's where you'll screw stuff up.
the exhaust side on vortecs are kinda crappy (just look at flow #'s). check out edelbrock's etec heads, they made improvements to the exhaust side of their heads.

10-18-2002, 09:48 AM	#1
trinic Registered User Join Date: Aug 2002 Location: Wide awake Wylie (North Texas) Posts: 322	Question bout cylinder heads Question 1. Would the newer 96+ vortec heads fit on a 327 block? I know i'd have to purchase a new intake that'll accept the new heads and be able to use my Edelbrock. Question 2. Will these heads perform better than the the double hump heads I have now? I know this all comes down to how well the heads are worked, and what cam and other combonations are used, but was thinking about going to the new heads. I've heard great things bout them..... Thx,

10-18-2002, 10:48 AM	#2
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	yes the vortecs will work, and they will work better than fuellies.. now having said that( I hate vortecs) it depends on what kind of performance your looking for?? just a daily driver that you want a little more punch from? vortecs are perfect for that..future improvements (needing more power) they dont lend them self to upgradeing on power. the vortecs will end up costing 750.00+.once you figure in intake..self aligning rockers..valve covers..spring upgrade.. for the same price you can get anyone of a number of aftermarket heads, that allow for more horses. It all depends on what the plan(future) of your build up is.... __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

10-18-2002, 11:27 AM	#3
Mudder Registered User Join Date: Feb 2001 Location: East Central, MO Posts: 11,339	Vortecs I'm putting on a set of vortecs right now with roller rockers an air gap intake (edlbrock) and a new holley avenger offroad carb. Well see what happens in a couple of days.

10-18-2002, 11:39 AM	#4
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Another nice thing about the Vortecs (or any other new head) is that the come "no-lead ready" with hardened valve seats. __________________ Tim

10-18-2002, 02:03 PM	#5
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	I'll have to add in here that I have a set of world product S/R heads on mine. They are unleaded friendly, have guide plates and screw in rocker studs, extra thick decks and are supposed to flow as good or better than any chevy head that ever came in a car. Plus I paid around $400 total for the pair NIB and they fit all the old manifolds and accesories. __________________ No truck :-(

10-18-2002, 02:21 PM	#6
trinic Registered User Join Date: Aug 2002 Location: Wide awake Wylie (North Texas) Posts: 322	keep the reply's coming sounds like good info so far. i'll let you'll know if i do the swap...

10-19-2002, 01:32 AM	#7
dmnall Registered User Join Date: Apr 2001 Location: Goleta, CA Posts: 505	I have a set of Fuelie heads on my 68 and if I were to actually buy another set of heads (I am thinking about upgrading when I have the cash), I would probably buy Edelbrock Etec 200 heads! Vortec based heads that actually out flow GM's Fast Burn Vortech Heads, have bigger Valves and Cost about $ 40 per head less then Fastburn!! Plus these heads will defintely outflow a Fuelie Heads!! __________________ 1968 C10 Truck LWB Fleetside 1968 C10 Truck SWB Stepside 1994 K2500 Ext Cab Fleetside 2008 Honda Civic Si lease Last edited by dmnall; 10-19-2002 at 01:36 AM.

10-19-2002, 08:02 PM	#8
special70gmc Registered User Join Date: Sep 2002 Location: long island, new york Posts: 1,333	what about port +polishing i no it made a world of difference on my 400ex (quad) what are the gains plus who does it? __________________ 1986 c-10 swb 5/7 drop 20'' coys 1958 belair 2door

10-19-2002, 09:59 PM	#9
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	a bowl port job will add between 20-30 HP gasket matching and polishing maybe another 10. all of the HP gains will be in the upper rpm range...DO NOT port the vortecs, from what I understrand it makes them flow worse __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

10-19-2002, 10:13 PM	#10
nate68 Registered User Join Date: Jan 2000 Location: ca Posts: 1,110	you can do work to the exhaust side and be ok but if you mess with the intake side; that's where you'll screw stuff up. the exhaust side on vortecs are kinda crappy (just look at flow #'s). check out edelbrock's etec heads, they made improvements to the exhaust side of their heads. __________________ 68 short step, 406/700r4, 9" w/discs.



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