When I went to the track this past week I meet this guy that had a good pair of 305 heads that he needed to sell. He was planning on using these heads on his 350 but he found some better ones. These are fully a ported and polished set with a valve job. They are also shaved down .020 and have brand new springs. The only problem is that they are from an 83 camaro and I was wondering if they would fit on my 91 rs?
And what do I have to drill or tap?

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One Tight Teal green 91 RS (my first car
All Rustangs suck!!!!
5.0 TBI with Auto trans
Z-28 wheels
K&n with dual snorkel intake
Tx Smog Pump Delete option
Valve cover breather
Rapid Fire plugs with Accel ignition wires,coil,cap and rotor
Flowtech headers with flowmaster and Half way cutout
B&M shift kit with trans cooler and hurst hotshift fulid
Hypertech thermomaster chip
96 LT1 cam with
New liffters and timing chain
All the free TBI mods

 

Sorry I meant older model ones.

 

the center intake hole will be angled different but thats no big deal. You might need shims for you distributor sing the heads are shorter. Ask on the general tech board about putting on shaved heads.

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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz



Got Beach?

 

If they are 416 casting heads and cheap you should take them. I trashed the swirl ports and got some 416s, ported em myself and the car screams

btw Later model denotes a newer car
like when you say "I have a late model camaro" that is the opposite of an early model camaro ie. like a '68

 

Thanx for the info guys!
By the way, I corrected my self on the second reply Pablo.

 

oops I missed it

 

How much better are the 416 heads that Pablo is using than the swirlports? I have a set from an L69 that I could use. Does anyone know what size the combustion chambers are and what C/R they would give with stock LO3 pistons?

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91 RS 5.0 TBI....LT4 cam....Edelbrock TES headers .. 3" exhaust ...Dynomax muffler...5spd... 3.08...underdrive pulleys...cold air K&N flat bottom breather...strut tower brace...6-point rollbar...sub-frame connectors...Koni shocks and struts...16" Black GTA wheels...Autometer guages...custom chip...Grant steering wheel...a/c delete...smog delete...rear seat delete...ultimate TBI mods...afpr...36mm front and 25mm rear swaybars with poly bushings... The peanut is dead!!!!

 

Try to find a pair of 081's same as 416's but center bolt valve covers.
They should be 9:03 to 1 on a stock "305"
They were the TPI heads on '91-92's 58cc's.

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Chronologically challenged. But still kicking!
'92 CAMARO RS
305 TBI 5/spd (now TPI)
B4C Alt.
'69 camaro-BB/Lenco,1050 dominators, /Pump Gas/no drugs 8.97-150+/3200lbs.
SoCal Thirdgen F-Bodies

 

Yeah I figured that the TPI heads would be like that. I just don't have a set unless I take the ones from my daughters Trans Am. LOL

 

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[This message has been edited by DM91RS (edited October 12, 2001).]

 

I'm still unsure what heads I would like to try. The TPI or L69 heads with an RPM intake is what the Am Sedan racers run and they make upwards of 330 HP with no porting. I like Dyno Don's suggestion of the TPI's keeping the compression at 9.3:1.

 

Does anyone on here run the TPI heads? Will they respond to regular porting? And are the tpi's and the 416's the same 58cc chamber size? The 416's are the one's Pablo's running. I keep debating this because I would like to install an RPM intake for regular heads that I can get cheap and keep my Vortec's for the LO5 block build up in the future. Thank's for any replys.
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91 RS 5.0 TBI....LT4 cam....Edelbrock headers....3"Dynomax exhaust....5spd.... 3.08.....Ultimate tbi....afpr...

[This message has been edited by DM91RS (edited October 12, 2001).]

 

Pablo for sure didn't have the TPI ones. I think he had the 305 H.O. ones. Was the 305 H.O. the L69?

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-Tas
'89 Formula WS.6
Mods and times:
TOP SECRET

Got Beach?

 

Tas, yes the L69 was the 305HO. If the valve covers and the middle intake bolts are the only differance I say port them and get some of the cool GMPP's cast alum. valve covers for them. I'm getting tired of the centerbolt covers. See ya.

 

I agree with dyno don, the 081's are like slightly improved versions of the 416's, They have better plug placement and the centerbolt covers are a plus. Get whichever you can find cheapest though (taking into account youll need new valve covers with the older ones) the 416's serve me well but they definately need a crap load of work with a grinder or dremel because of the loads of casting flash they have

 

Thanks for the replys. I have got to agree with you about the valve covers after looking at some of the oil running out of the old style's that I have looked at lately.

 

DM91RS:
Look in the classifieds I have a set of 081's for $50.

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Chronologically challenged. But still kicking!
'92 CAMARO RS
305 TBI 5/spd (now TPI)
B4C Alt.
Cam change:TRW 198/210 ,450/.460 114 LSA
Stock TBI manifolds
'85 IROC Ex.
14.94-92.00 mph
SPDC base and "350" Vortec coming soon!
'69 camaro-BB/Lenco,1050 dominators, /Pump Gas/no drugs 8.97-150+/3200lbs.
SoCal Thirdgen F-Bodies

 

You can "unswirl" the valve bowls fairly easily, and with good results if the cam selection is correct. The rest of the port areas will need some blending as well, but if you have a die grinder, carbide burr, and some time, you can make them flow.



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Later,
Vader
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If you want to beat the World, it might reach up and pull you down...
Adobe Acrobat Reader

 

Nopar, ay? dahaha, cute

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-Tas
'89 Formula WS.6
Mods and times:
TOP SECRET

Got Beach?

 

081s arent swirl port

unless you are talking about the tbi heads which are 187's I think. I dont think there is any helping those heads, they are pure $h!t