Any idea as to what this switch is for?

[360Rocket]

Located rear passenger side of the intake manifold/block? This is a 1970 Pontiac 350 removed to replace with a 455 with FiTech. Trying to label and figure out wiring and just curious if this is needed to be transferred to the new engine? Thanks.

[Last Indian]

16 hours ago, 360Rocket said:

Located rear passenger side of the intake manifold/block? This is a 1970 Pontiac 350 removed to replace with a 455 with FiTech. Trying to label and figure out wiring and just curious if this is needed to be transferred to the new engine? Thanks.

It may sound crazy & may not be, but it looks like an old add on aftermarket washer fluid pump. Where does the pigtail wire harness lead too?

This a newer type, the one you show is much much older. There are a lots of variations

Edited February 18, 2018 by Last Indian

[360Rocket]

Transmission Controlled spark solenoid valve. Supposed to add  advance in the timing when trans is in high gear and the engine is cold or hot conditions.

 

Edited February 19, 2018 by 360Rocket

[Last Indian]

2 hours ago, 360Rocket said:

Transmission Controlled spark solenoid valve. Supposed to add  advance in the timing when trans is in high gear and the engine is cold or hot conditions.

 

Why to go 360! Glad you found it!