Hey i have taken my car off the road for a fue months and when i have the spare time and cash im going to be doing some work to it, 2 of the main things is i will be getting my old beat up Holley 600 (off a 67 camaro) and getting it fully rebuilt for $200AUD and im looking for a new manifold at the same time, i am cuttently leaning towards a Edelbrock Performer (idle to 5,500 rpm) or a Weiand Stelth (idle to 6,800 rpm) both around the $260AUD mark.
Im wondering if anyone is running either of these and what they think of them?
I have a 2.5" Holley drop base air filter (not on car atm). Also looking in to new headers aswell but that is a diff subject.

 

I run a stealth on my 355ci and my buddy runs one on his big block 486ci. The work very well I have no complaints. And I f your going to get some headers go for the hemand man elite headers.

 

Are you running the stock quadrajet now? If so, is there a particular problem with it? If not, the Holley isn't going to give you any performance increase.

The manifold to use is based on the cam you're running. What cam are you running? If stock, you aren't going to get much of a performance boost by running either one. The Stealth is a higher RPM manifold than the Performer, more along the line of a Performer RPM.

 

My Q-Jet gets about 9-10mpg around town, the Holley gets around 18mpg but the holley is leaking from the throtle shaft and that is why im getting it re-built. Also over here Holleys are every where so it is easer to get parts for.
My Q-jet is an emissions era (late 70s) carb off a GMC truck, well that is what i got from the ID number.
Im looking in to a cam but dont know what would be best.

 

I'd say the q-jet needs the rebuild the most - 9mpg vs 18mpg on the same motor?? Holy cow. Well, in your situation it looks like the holley is your best bet - if the parts are easier to get, etc.

I'd do the stealth, or a performer RPM. It doesn't look like you have the power bulge hood, I thought an '84 TA would have it? My performer RPM fits with the normal stock air cleaner on with my power bulge hood.

 

It is a 85 hood, it was on the car when i got it.
A local performance store has a 4" bolt on cowl, im just not looking forward to cutting the hole in my hood for the aircleaner.

 

The Headers are a problem because my car is RHD not many aftermarket systems will work without major mods, the only flow tested headers that fit the 305 with RHD in Aus is a set of block huggers.
https://ssl.shoalhaven.net.au/usgmse...f66b163f168e48
they are $390AUD and that aint to bad in my books and they have 2 1/2 in. collector tubes, 1 1/2 in. primaries and 3/16 in. flanges

 

If you can get some 1 5/8 primary's they would be alot better.

 

I think the local import store has hooker headers but the price is about double the block Hugger ones and they require major modifications to fit a RHD, I might as well handover about $1200 for a set of S/Steal custom extractors that would flow mutch better than both of the above. BUT i don't have that kind of cash to spend, Im engaged and looking for my first house.
in the next 6 months i have a budget of MAX $1000 for my car.

 

I have chosen to go with the Stealth because it is an off idle intake where the Performer RPM is 1500RPM+

But if i go with these mods id say it would be like a new car.
$220 = Carb + Gaskets.
$285 = Intake + Gasket.
$420 = Headers + Gaskets or Cam + lifters. (maby more)
$22 = Spark Plugs.
$30 = Oil + Filter.
$977.00 - all up.

What would be better a Cam or new Headers with the Stealth intake?
Engine internals are stock, exept for the double roller timing chain (if you can call that an internal).

 

Weiand is a little generous with their powerband rating. But, it is a good manifold.

A cam something like the Comp XE268 would be a pretty good combo.

As for headers, hard to say. Didn't we talk about exhaust routing once before? I believe that discussion concluded most any 3rd gen 1-5/8" primary header would work, although you might have to ding in a pipe or two. That would be better than 1-1/2" primaries.

 

yeah we have, but i just contacted the import place and they said the only way the hooker ones would fit is if i had them cut and shut to work with my car. evan they said it would be better to get a custom set made from an exhaust place.

 

Stick with headers for now and when you get some more money saved up go for a new cam and heads. When you get a cam thats when its time for some heads becasue they will need to be matched up well.

 

thanks will do.
I should have realy said my car will not be going to the track it wont be in any races it will just be a weekend car with a nice note and to be able to power off form the local V8 (Holden 304) they are around 165 to 200kw depending on the car.

Thanks to all that helped, i will be comencing the upgrades in the next fue months.

 

I would Go with Headers before the cam....If ur gonna up all that intake flow it's gotta get out somehow and adding a cam with that intake will only double ur problem. Plus if your gonna do a cam it's best to get a kit with new springs and lifters and mabey some nice roller tip rockers and u'll definately exceed ur budget.



I personaly run a stealth manifold with a comp extreme 274h and have had no problems just some cab tunning issues.

I've never seen a RHD T/A but I run hedman torque step shorties. They a bolt on for cats as long as u don't run a huge oil pan. I had to modify for duel exhaust but anythings possible with a cutter and welder.

only cost me $120

By the way 1984 was a good year

 

that engine bay looks sick!

But i have put it on hold, im now thinking of going to a 350.
my 305 is breathing heaps and if i start investing cash in to it i will need to rebuild it aswell and it would add up quite quickley when a NEW 330HP 350ci Crate engine is $3,200AUD