I'm looking to purchase a new heater core and waterpump for a '70 Vista 350 w/o a/c! Just to be sure, are these units interchangable w/ Cutlass ,f-85 and any differences in years between '70-'72? Seems where ever I look on e-bay etc, the '70 model year is skipped over........thanks in advance!

 

Advance auto parts has them. I would check your local part stores.

 

I didn't see any water pumps for a '70 at the Advance site?

In the GM parts catalog it does show that the '70 water pump is different than the later models.
It shows part number 230899 without air or heavy duty cooling.
I did a quick search and this place has new ones by GMB for example.

http://www.car-stuff.com/mmparts/old...ater_pump.html

The catalog shows the heater core is the same for 68-72, part number 301483.

That place has them too.

http://www.car-stuff.com/store/?D=he...0Model_Cutlass

I'm working on your woodgrain patterns Erik, fresh out of 16 inch masking paper to make another set.

 

Yes, the VC is the same as any other A-body from the dash board forward. Be sure the water pump length matches your old one.

 

The 70 water pump, has a larger lower radiator hose opening.