my friend has a 355 in his 85 camaro, the cam is just a little bigger than stock and stock heads with some porting done. the guy he bought the car from said it had an aluminum z28, what years did gm make those?
but i was thinking that it was of a 302 and they dont make much power till the higher rpms right? and he only takes his motor to 5000, so i was thinking that he would be better off with a performer intake. what do guys think?

The Z-28 aluminum manifold that you are talking is slightly better then the Performer and about equal to an early Performer RPM. It's Holley match is the 300-36 or (I think) Strip Dominator dual plane.

The Wieand manifold is an 8004 or an early "Stealth" if memory serves me right.

I don't recall the years it was used by GM but I think the last PN's on it were something like -144, (?). The last GM aluminum Holley high rise manifold was the best if thats what he has. IMHO. pdq67

I'm sorry, They are good from about 1200/1500 rpm up to 6500/7000 rpm if the engine can go that much. A real fine GM piece!! pdq67

Hey, another thing to keep in mind is that an "Z28 aluminum intake" could be the low rise Qudrajet Intake with EGR (from a 305 or 350 used through the late 70's to late 80's). Just something else to keep in mind. I had a couple of people tell me that they had "an aluminum Z28 Intake" on their car and all it really was was the Q-Jet intake (which is decent, although not great street manifold in its own right...)

Good point Brad6899,

I didn't even consider the "newer" Q-Jet Al. manifolds because they are stock instead of Hp pieces.

You know, it's funny but I've read where a stock Q-Jet manifold is stronger then any of the other manifolds up to about 3500 rpm or so which means to me that it is an EXCELLENT stock engine manifold, imho. pdq67

DO NOT!!! STRAY FROM STOCK INTAKE!!!
I can't stress this enough, I saw a guy do it once and he lost control of the car.

THATS RIGHT, XCmusic!!!

First it's just a carb change, then a cam next, headers then the heads!!

ALL of a sudden the "more power Scottie" takes over and a 383 looks about right. A couple a months later and you find a small BB that needs a home so you bite for it.

A year or so later and the little 396/402 BB makes way for a 454 that lasts about another year and then it becomes a 496!!!

Next, Bill Mitchell's 620+ just looks about right, and by this time the wife and kids or girlfriend walk out the door!!!

He, He!!! BUT isn't it great!!! pdq67

i know what u are talking about im doing the same thing, but trying to keep in small block! could u guys tell me what kind it is if i can find some numbers on it?

Marky,

Post the numbers and letters that are on the small flat pad that is above the pass side waterpump outlet that sticks out below the head. You don't have to post all the numbers, but the letters are the code to GM's engine applications, (like TKC, MO or DZ or codes like this).

Somebody should be able to tell you wehat you have if you post over in the "Tag" section. Check it out. pdq67

a true alum. z/28 intake was made for the 302 67-69 the lt1 350 Im pretty sure had the same intake on it I just sold my 68 version it was about a inch taller then cast iron square flange only no qjet another thing to look for is the winters foundry casting mark which is a snow flake I ran 13s at 4500 feet carked up on street tires with it it pulled well but a single plane worked better I got 200 for mine if your concerned sale it to a collector and buy what ever you want with the profits