There should be an oil level mark of some kind on the filter body, you may have to look closely inside and out. Normal deal with oil bath air filters is to use the same oil that you have in the engine. Any idea what carb is fitted?
Martin

Oil bath is an old style filtration method. I would change to a quality paper filter style which are more efficient.

Thanks for the help to date all good stuff,

I have just been looking about it tonight and have removed the airfilter , a large deep pan affair with a high center tube that the enclosed filter fits over, in the bottom of the large pan fitted to the carb there was a quantity of oil, 1/4-1/2 an inch I would estimate, to me it appears to be an oil bath is this correct. I have removed the oil and cleaned out the pan. I have not put any oil back in it or ran the motor. Is oil in there correct?, if so how much?, also does it need to be there?, is it detrimental to run without it?.

Cheers

I use Valvoline VR 1 20/50 in my 350. Sold as a "racing" oil, it has a high zinc content which is good . Available at Euro car parts. I use AC Delco PF35 filters as originally fitted by GM from Rodley Motors. Do not use Fram as some folk have had very bad luck with their filters causing engine damage. Hope this helps.

Shed heres a link mate speak to Jamie or Laura

CHEVY MOTORS items - Get great deals on American vehicles, CHEVY items on eBay Stores!

Good luck Mike

Check chevymotors on here or ebay,uk based

Everything is available for these old trucks right down to nuts and bolts.
Service items for the 350 can be had from several UK suppliers(US Automotive, Real Steel etc) so that's not a problem.
Door seals should be fitted around the complete perimeter of the panel. Available from US suppliers or some truck specialists on ebay.
The GMC is bascially the same as the Chevy of that year apart from some front panels, dash,grill etc.
Check out LMC truck parts or Brothers. Both in the states but it will show you what's available.

Help with 57 GMC Pick up

Hi,
I have just bought a 57 GMC Pick up with a 350 V8. Looking for a few pointers and some advise, I am a bike man and this is my first venture into trucks. Any recommendations for parts suppliers, the truck is up and running so mainly sundries at present.

How much and what grade of oil?.

Any readly avaliable oil filters that fit?,

There are no door seals fitted, is this correct?,

Do "peep mirrors" work ?.

I am based in South Cumbria so a bit of a desert as far as specialist shops are concerned.

Thanks in antisipation.

Cheers