1970 LT1 Intake Manifold Hardware

[David S.]

Hi All,

Can someone tell me the correct head markings on 70 LT1 Intake hardware. Also what plating finish is correct?

Thanks,
Dave

[Terry M.]

Re: 1970 LT1 Intake Manifold Hardware

Hi All,

Can someone tell me the correct head markings on 70 LT1 Intake hardware. Also what plating finish is correct?

Thanks,
Dave

I could if my computer hadn't crashed a year ago. IIRC on my 1970 there are seven different headmarks (if you count a stud as a headmark) for the intake manifold. I know I posted the details way way back, but those notes are gone with the electrons in the old computer.

[Patrick H.]

Re: 1970 LT1 Intake Manifold Hardware

I could if my computer hadn't crashed a year ago.

And you wonder why I have three (3) backup hard drives...

[Michael F.]

Re: 1970 LT1 Intake Manifold Hardware

I believe bolts are cad plated, if nobody answers I will see if I can get out to my storage and check my car.

[David S.]

Re: 1970 LT1 Intake Manifold Hardware

Thanks Guys.

It appears I have original hardware (two studs included) but some of the head marks are different... I figured they should be cad or zinc but need confirmation before sending them out.

Thanks all,
Dave

[Terry M.]

Re: 1970 LT1 Intake Manifold Hardware

I am pretty sure my bolts are black -- studs natural. They all get painted silver with the intake for 1970.

[David L.]

Re: 1970 LT1 Intake Manifold Hardware

There is a website about an original 1,100-mile 1970 Z28 with lots of photos of the engine. If you scroll down the engine photo section there are a few photos of the intake manifold bolts. I would assume that the bolts would be the same for a 1970 Corvette LT1 since both engines were made in Flint. As Terry basically mentioned there were several different vendors that supplied the bolts.

Dave

http://www.1970z28camaro.com/engine/

[Patrick H.]

Re: 1970 LT1 Intake Manifold Hardware

I am pretty sure my bolts are black -- studs natural. They all get painted silver with the intake for 1970.

That is my recollection as well.

[David S.]

Re: 1970 LT1 Intake Manifold Hardware

I am pretty sure my bolts are black -- studs natural. They all get painted silver with the intake for 1970.

I thought I read in the manual that the intake was natural aluminum. It's painted silver? I would aside if the hardware is painted silver that the intake was painted on the motor? Should there be silver overspray anywhere?

Thanks,
Dave

[Mike E.]

Re: 1970 LT1 Intake Manifold Hardware

There is a website about an original 1,100-mile 1970 Z28 with lots of photos of the engine. If you scroll down the engine photo section there are a few photos of the intake manifold bolts. I would assume that the bolts would be the same for a 1970 Corvette LT1 since both engines were made in Flint. As Terry basically mentioned there were several different vendors that supplied the bolts.

Dave

http://www.1970z28camaro.com/engine/

I never realized that Chevrolet installed screw in rocker arm studs and guide plates on factory heads. Was that exclusive to a LT1?



Mike

[Terry M.]

Re: 1970 LT1 Intake Manifold Hardware

I thought I read in the manual that the intake was natural aluminum. It's painted silver? I would aside if the hardware is painted silver that the intake was painted on the motor? Should there be silver overspray anywhere?

Thanks,
Dave

To repeat what is basically in the 1970-72 TIM&JG since 1993. See Pages 80 & 81:
Orange was painted then intake was sprayed with silver. I have a small amount of silver residue on the rocker covers. Real cheap stuff that melted in the gasoline leaking from the Holley, so most of the silver paint flows away with the gasoline.

Some hand brushwork was done on both orange (ignition wire supports) and silver. The amount of hand work depended on how early/late your engine is. More handwork early, less later. No orange overspray on the bell housing on early engines. The back of the engine was painted with a brush by hand on early engines; later they painted the back of the engine on the paint line like all the other small blocks.

[Sal C.]

Re: 1970 LT1 Intake Manifold Hardware

Terry and Patrick are correct. In the end, the final finish is paint. Happy Thanksgiving.

[Kenneth B.]

Re: 1970 LT1 Intake Manifold Hardware

I never realized that Chevrolet installed screw in rocker arm studs and guide plates on factory heads. Was that exclusive to a LT1?



Mike

Yes I believe it was only on the LT-1'S

[Kenneth H.]

Re: 1970 LT1 Intake Manifold Hardware

Terry,

I think that this is what you posted.

"On my 1970 LT1 there are, as best I recall, seven different kindsof fasteners. That is about all I can remember from a years ago quest todocument them at the request of someone on this board. I believe the onlyflange head bolt is the #1 for the lifting bracket, but you may want someverification of that. Unfortunately, my car is not very accessible at thistime.

Well ain't computers wonderful. Look what I found:

LT1 intake manifold bolts
Odd numbers are drivers side Even numbers are passenger side
Numbers begin at the front of the car.

#1 three lines RSC #2 three lines N inside a circle
#3 three lines N inside a circle #4 three lines M
#5 three lines RSC #6 three lines M
#7 three lines C #8 Stud TCS
#9 three lines C #10 three lines C
#11 three lines C #12 three lines RSC

I have a feeling these won't line up for po po. Oh well, maybe you will get thedrift.
__________________
Terry"

I thought that the info was important so I saved it.

Ken

[Joe L.]

Re: 1970 LT1 Intake Manifold Hardware

I never realized that Chevrolet installed screw in rocker arm studs and guide plates on factory heads. Was that exclusive to a LT1?



Mike

Mike------


As far as 1955-72 Corvettes are concerned, screw-in studs were used only for LT-1 engines. However, after 1972 they were used for L-82 engines.