There should be a sticker by the radiator to verify the engine size but barring that, I'm pretty sure the only 6 cylinder engines put in 1965 vans was a 230 cu. in. inline six. The only other 6 cylinder available was a 292 but those were special order for pickups. I doubt they put one in a van.
My father owns an early 65 with a 327 V8. The decals are on the valve covers.
To find out the year of your Chevy engine, locate the model number. The model number indicates the year the motor was made.
KBB.com Autotrader.com
ford, chevy, or dodge?
You can find a Chevy 350 engine for sale at a car parts shop. You may also look for the engine online. There are many different places in which one could find this item online.
Engine diagrams can be used as guides.. An engine diagram to a 2003 Chevy Trailblazer can be found in its maintenance and repair manuals.
You can find one on eBay.com for a reasonable price.
You can find a diagram of a 2000 2.2 L Chevy S-10 engine online. There are several websites with this diagram. You can also contact a Chevy dealer for info.
chiltons repair manual for 68 chevy's.
An engine diagram for the 2003 Chevy S10 with a 2.2 engine can be found in the maintenance manual. It can also be found in the repair manual to the car.
You can find a 1999 Chevy Tahoe engine fuse block wiring diagram in the car's owner's manual. You can also find it at most auto part stores.
How do I release the frozen brakes on the drum of a 1965 Chevy 3/4 ton pickup