Can anyone visually identify whether this is a 305 or a 350 from this pic?

 

Nope. Externally, they look the same.

On the side of the block, there may be a 5.0L or 5.7L cast into the block. If not, you either need to get the casting number off the back of the block or the suffix number off the front to identify it.

 

if the engine has never been replaced you can also check the VIN number i think it is the 8th or 1oth number/digit then call your local chevy dealership and give them the number/digit before it closes down and ask them they should be able to tell you

 

Eigth position in the Vin (F) 305 TPI or (8) 350 TPI.....

 

im guessing 350 only because that vualve on top looks ljust like my 350 5.7l hey i just got a 1986 camaro with a 92 v8 5.7 liter engine in it . the car was running really crappy so i had to change firing order on the car it was running alot better.. but still wasnt right about a week later i discovred the smog silinoid was disconnected from the terminal where it goes into the top of the engine also the electric was not pluged into the conponent. i did some research and found out the correct way to hook it up .. i started and drove the car about 5 blocks car seamed to be running better then ever smooth and more power . after i turned the car off and tryed to start it up the next day .. car does not start .. as u hold the exnition and pump the gas the engine gets slowly to full running speed as if its running and when i let go of the exnition it turnes off as quick as i let go ?? i also tryed removing the smog silinoid back to how i org found it still same story any suggestions ?? thanks

 

It also looks just like a 305 5.0L.