1970 Stage 1 questions

I have a 1970 Stage 1 that I am doing frame/suspension restoration on. Is the driveshaft colors purple/black on a 4-speed? Are sway bars black or cast. The tie rods and center link black or cast? Idler arm nuts black or clear zinc? Rear differential gray/steel with black sprayed on back? Steering shaft - painted or black phosphate? Did a April 1970 car use regular smooth shocks(no spirals) if so were they painted 'shock gray'? I am sure I will have other questions.. Thanks in advance....

 

http://www.v8buick.com/showthread.php?115198-Flynbuicks-70-GSX-STG-1-4spd-in-pictures/page2


This should cover most of your questions.

 

Look at the sticky threads in our Chasis Restoration forum.

 

thanks for reference threads. very useful info. did the 1970 model use the 2-piece front disc brake rotors? As always thanks in advance....

 

Yes. The 2 piece rotors were used in 1970.

 

The 2-piece front rotors were used for the majority of the 70 model year but were changed to the 1-piece style towards the end. According to many sources the change took place sometime in the March/April 1970 time period. (I believe this is what the Chevelle guys came up with.)

If you have an April build you can probably get away with either style, but if you do use the 1-piece units make sure they have the cooling groove cut into them, like the 2-piece ones had.
Duane

 

Jason,
We always called it a cooling groove. Either way I don't think it worked worth a damn, ..........but it needs to be there thru at least to the end of the 71 production year. I have tracked it that far.
Duane

PS. I made Mark take mine off my 71 car when the chassis was finished and cut them because the new ones do not come with them. I think he ruined a couple of bits doing it.:laugh::laugh:

 

my '70 chevelle, built in oshawa the 3rd week of april, had the one piece rotor.

 

:laugh:

 

I would guess there was some overlap until parts supplies were exhausted. My GSX was built 3rd week of April, and had (has) 2 pc rotors. My 3rd week March car has them as well.

 

Idler Arm Nuts were silver cad. Thye are still available from GM. Same nuts were used to attach the master cylinder to the power booster.