MarkC

Will the 1969 Z28 intake (3932472) fit under the small block hood? I have an all stock 1966 L79 and am considering changing the intake for a few more hp. Also, is it worth the trouble to change with a stock L79.

I have a half inch now between the air cleaner and the hood. Thanks for any help.

Mark

Nowhere Man

I think the L79 intake is the same as a LT1/Z28 intake only with no oil fill tube

65tripleblack

Hi Mark,

It's 5/8" taller.

Scott Marzahl

They both have oil fill tubes too, GM LT-1, Z28 replacement intake. The thermostat housing bolt pattern is different and you may have to change housings so the hose lines up. This also required me to bend up a new fuel line.

DZAUTO

The early (the GOOD ones!!!!!!!) Z28/LT1 intake manifolds are/were the tallest FACTORY SB alum intake ever available. And as far as I'm concerned, this is/was the ultimate all around 4bl intake that Chevy ever came up with. I have one of these on almost all of my SB cars (of course, the 56 Vette has FI).
There were fundamentally TWO variations of this manifold (actually 3, but the third one is the same as the second version, but without a hole up front for the oil fill tube).

There was the 67-68 version (which of course was Z28 only) and the 69-72 version. The 70-72 version (I guess you could call it the third version) did not have a hole for an oil fill tube, BUT, it still had the boss, thus there was a place for the hole to be machined easily.

EXCEPT FOR CORVETTES AND TRUCKS, the alternator and air cond compressor swapped sides in 69. As a result, all SB intake manifolds (again, except Vettes and trucks) had some changes made to the front of the manifold.

Here is a comparrison between the 2 main versions (67-68 and 69-72). The intake with the adapter plate for a Q-jet is the 67-68 version (it is on a 350 in my son's 68 Chevelle). The most noticeable difference(s) is the water cross over passage, thermostat housing position, threaded holes for temp sender and heater hose fittings and threaded hole for bracket mounting.
For use on an early Vette with the Alt mounted on the LEFT side, the 67-68 version would be more practical, but those are VERY hard to come by. I've been looking for one (at an acceptable price) for years and finally ran across the one below for $225 (a steal today).









This is the rear. As can be seen, there is a slight variation in the threaded bosses for coil mounting.


This is a side view showing just how tall these manifolds really are.


The intakes above are PRODUCTION manifolds. The one in Scott's reply above is the GM service replacement manifold.
Look closely at the lower end of the intake runners. The service manifold has a slight flange. The production manifolds had a "plain" end at the end of the intake runners. A dead giveaway as to whether it's a production or service replacement manifold.


By the way, here's what I was referring to above regarding Chevy swapping sides with the alt and AC comp in 69 (except on Vettes and trucks).
The first two pictures are my son's 68 Chevelle, the last two are of our 70 Chevelle conv.









In my book, that was one of the DUMBEST things Chevrolet ever did!!!! Olds stayed smart and kept the AC comp on the passenger side. If you have EVER pulled an engine from a 69-later Chevy with the AC comp on the driver side, you will completely understand what I'm talking about. In order to pull the engine on a 69-later Chevy, IT IS NECESSARY TO BREAK THE AC system. Not so on a 68-earlier Chevy!
Tom Parsons

Scott Marzahl

Great write up as usual Tom!

FASTZ

I had a 472 intake on my '66 coupe when I bought it and it fit without a problem

6T5RUSH

I'll 2nd the fact that the service replacement LT1 intake is almost an inch taller. Here's a pic of mine...notice the clip for the vacuum line is about an inch below where the line should hook to.

Jim
In God We Trust!

MarkC

Thanks for the replies. It looks like it is a real close fit (within an 1/8 of an inch).

Joe, thanks for the info on height.

Scott, it looks like you were in the process of a frame off when the picture was taken. Did you have to shim the body up or did the hood fit? What carb and choke did you use? Did you notice a power increase?

Tom, thanks for your through explantation.

If I could find a air filter with about 2 7/8" height, it would just about solve the problem.

It also looks like I will have an issue with the choke. The intake is 5/8 taller so the rod from the choke heat raiser will have to be longer.

I measured the height on mine with tin foil some time ago. I have since installed a 5 speed so I plan a more precise measurement. I'll probably make the change when it gets colder as I am using the car in this nice fall weather. Thanks

Mark

larrywalk

I think the key item is having the right drop on your air cleaner base. With a 2" drop, these manifolds fit fine with a 14 x 3" element.

66jack

If you want to sell your L79 intake let me know....

Scott Marzahl

Mark I can't help you too much that is how the engine looked yesterday. I do plan on adding a few extra shims when I drop the body on next week.

6T7L71CPE

Here's a picture of a 14044836, reproduction, replacement, whatever, with the flange:

MarkC

Larry and 66Jack

The air cleaner I have is the stock 66 a/c for an L79 and I believe the drop is 2 inches. I will keep the intake and carb as the car has the original engine.


Mark

66jack

I tried.....

larrywalk

I was just doing some work on my '65... It has a 2" drop, and the 14044836 intake manifold with a Holley carb. It clears just fine.

Nowhere Man

66Jack contact Gees Corvettes in PA: Keeneyville, PA 16935
Phone: 570-376-3421

he is very easy to deal with and at Carlisle he had a few for sale

66jack

Keith:

Thanks for the lead

Nowhere Man

anytime. if its one thing I am good at is spending others people money

66jack

You didn't notice the price on them did you?