1978 Pontiac Grand Prix SJ 350 Olds build

Status
Not open for further replies.

350gp

Not-quite-so-new-guy
Mar 4, 2021
8
0
1
G body Cutlass for the Olds 350 for headers. What is the big number by #1 and #8 spark plugs?
Im sorry, I couldnt find what you were talking about but i took these pictures if it helps. not too sure though
 

Attachments

  • IMG_20210308_125757530.jpg
    IMG_20210308_125757530.jpg
    3.5 MB · Views: 134
  • IMG_20210308_125802703.jpg
    IMG_20210308_125802703.jpg
    3.4 MB · Views: 132
  • IMG_20210308_125816736.jpg
    IMG_20210308_125816736.jpg
    3.9 MB · Views: 129
  • IMG_20210308_125823257.jpg
    IMG_20210308_125823257.jpg
    2.9 MB · Views: 123
  • IMG_20210308_125827299.jpg
    IMG_20210308_125827299.jpg
    2.6 MB · Views: 126
  • IMG_20210308_125842365.jpg
    IMG_20210308_125842365.jpg
    2.7 MB · Views: 129
  • IMG_20210308_125924089.jpg
    IMG_20210308_125924089.jpg
    2.4 MB · Views: 142
  • IMG_20210308_125919246.jpg
    IMG_20210308_125919246.jpg
    2.1 MB · Views: 133
Oct 14, 2008
8,806
7,746
113
Melville,Saskatchewan
That is a 73 to 76 motor. It will have around 8 to 1 compression and the usual .400" lift cam stock. Those #8 heads have 77 to 78cc chambers measured by me, spec is 79. There is a restriction just under the exhaust valve. If a bowl hog cutter is used, they flow as well as early heads. Flat top pistons will give 9 to 1. This is assuming this motor is stock inside. Many still are because these motors were very durable and very choked in stock form.
 
  • Like
Reactions: 1 user

350gp

Not-quite-so-new-guy
Mar 4, 2021
8
0
1
That is a 73 to 76 motor. It will have around 8 to 1 compression and the usual .400" lift cam stock. Those #8 heads have 77 to 78cc chambers measured by me, spec is 79. There is a restriction just under the exhaust valve. If a bowl hog cutter is used, they flow as well as early heads. Flat top pistons will give 9 to 1. This is assuming this motor is stock inside. Many still are because these motors were very durable and very choked in stock form.
Thank you, this helps a lot. This is going to sound maybe dumb but how can I get my car at least cranking. I dont think my wiring for anything is set up correctly because my father worked on it so long ago so there's a lot missing or just not connected. I've been doing some research but I want to be exactly sure i dont mess anything up. If anyone has a wiring diagram or can perhaps explain how all of that works for this car that would be great. and I thank you all for this cool learning experience
 

350gp

Not-quite-so-new-guy
Mar 4, 2021
8
0
1
Thank you, this helps a lot. This is going to sound maybe dumb but how can I get my car at least cranking. I dont think my wiring for anything is set up correctly because my father worked on it so long ago so there's a lot missing or just not connected. I've been doing some research but I want to be exactly sure i dont mess anything up. If anyone has a wiring diagram or can perhaps explain how all of that works for this car that would be great. and I thank you all for this cool learning experience
Basically when i turn the key, nothing happens at all, no click, no crank, no start
 
Oct 14, 2008
8,806
7,746
113
Melville,Saskatchewan
Make sure the negative battery cable is attached to the block. Positive to the big terminal on the starter. Also a couple of accessory wies including a fusible link go on the big terminal as well. There is a small wire to the solenoid.
 
  • Like
Reactions: 1 user
Status
Not open for further replies.

GBodyForum is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates.

Please support GBodyForum Sponsors

Classic Truck Consoles Dixie Restoration Depot UMI Performance

Contact [email protected] for info on becoming a sponsor