Edelbrock LD4B layout

[tanis4457]

I recently acquired a LD4B intake for my 273 and since I've never swapped an intake manifold before I was wondering what some of the extra ports are for the intake manifold. I looked around on the web and on Edelbrock's website but couldn't find the info I wanted. So I was wondering if you guys could help me out?

I tried to get the photo to link directly to my post from my google drive but I couldn't get it to work.

1. inlet in water passage for??
2. what is the tube over the temp sending unit for ??
3. inlet in water passage for???
4. vacuum port??
5. plugged valve on exhaust passage?
6. dont know??
7. vacuum port??

https://drive.google.com/open?id=0B4jhnfPRd2C8UTBLNVM0MTNVWFE

 

[krazykuda]

The numbers correlate to the ones in the reference picture:

1. Stock water temp sensor.

2. Heater hose attach.

3. A/C mounting boss

4. A/C mounting boss

5. EGR port hole --> keep it plugged

6. Mounting boss for some bracket that i've never seen before - leave open

7. Vacuum port for power brake booster or vacuum attachments --> use if needed, keep plugged if not...

View attachment LD4BB.jpg

 

[Dustert73]

1 is where the temp sensor goes

 

[tanis4457]

sweet thanks for the info

 

[mvh]

You would use #7 if you have a Performance Indicator (vacuum gauge).

 

[lemondana]

No. 6 is for the early 64-66 throttle bracket.

 

[krazykuda]

No. 6 is for the early 64-66 throttle bracket.

That makes sense... #-o