my 88 chevy that i got off my father needs an oil pan, here is the problem how can i tell if its a 305 or a 350, when i did the head gaskets my father ordered everything for it, so im just curious how can you tell the difference?

might be the same thing.

thats what i was thinking.

i think they are the same i just want to be sure 100%

does it have a trim line?

could check the vin, but i think its the same.

vin another way that is hard is to take a small mirror and put it behind the drivers side head and it will be marked what it is I believe. or look for any original stickers in the engine bay or possibly the door.

the sticker under the hood should say how many liters it is.that is if it's still there. that will tell you the size 5.7=350 5.0=305

the oil pan is the same. How the hell dont you know if its a 350 or a 305. FAIL

Pull the head and measure the stroke. That will tell you for sure.

OH wait.....

Paul..............if that was ur idea of humor, go kill urself

The 8th digit in the VIN is the engine code. It is also on the Emissions sticker under the hood, As previously stated. If you can find it on the sticker any auto parts store can tell you if you have the 8th digit.

But as also stated they are all the same. Good luck with the gaskets.

look on the back of the drivers side head. closest to the firewall.

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Silly Chevys

Adam they are the same, if you need one let me know I have about 359,987,671 of them. Probably a 305 in your truck, but like I said it doesn't matter, all sbc have the same base pan.

And to conclude...

Rockauto.com

88 Chevy 1500

305

Oil Pan Gasket.
FEL-PRO Part # OS34500R {Set}
PermaDry® molded rubber gskt. incl.

Oil Pan
ATP Part # 103033 {Engine Oil Pan}

350
Oil Pan Gasket
FEL-PRO Part # OS34500R {Set}
Chevrolet engine; PermaDry® molded rubber gskt. incl.

ATP Part # 103033 {Engine Oil Pan}
4 quart capacity

all set, its on order will be here tomorrow, and its a 5.7 350 oooooright!!

?....In 1988 only one car is listed with a V8 350 ...O code IROC Camaro.. all else had 305s

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its not the factory motor i believe

oh ok......