According to www.mortec.com it is a 2 or 4 bolt main 350 . It is a very common 350 ,I think they where put in just about every thing HA HA .I've got and have had several.

 

Hi I Have A Block With The Casting Number 3970010 I Have No Idea What Size Motor It Is It Has Power Pack Heads Dose Anyone Know Whate It Is Oh Ya It Also Had A 4 Speed When I Took It Out Of My Truck I Was Also Told It Was A 350 Can Anyone Help??

Very annoying when each word starting letter is in CAPS. Hard to read.

What's the story, you kids find a new program that does this automatically? I don't believe anyone would take the time to do the manually. I see this and I say "rookie kid, not worth replying to".

 

As mentioned earlier, it's chances are very good it's a 350. Other size engines were built with that casting number as well but the 350 was by far and away the most common. What is the casting number on the heads?

 

Very annoying when each word starting letter is in CAPS. Hard to read.

What's the story, you kids find a new program that does this automatically? I don't believe anyone would take the time to do the manually. I see this and I say "rookie kid, not worth replying to".

I'm 40 and couldn't care less if all caps but.......periods and commas would be nice

 

Hey man I have the exact same casting number on my block I am building up and after doing some research I now know it is a 1970 chevy 350 used in corvettes and high performance. This block was rated to handle up to 375hp according to the sites I have come across.

Hope this helps :welcome:

 

i bealeave that would be either a 302(or 305?)/327/350. i just went threw the same probley and my 350 had the same cast numbers

 

i bealeave that would be either a 302(or 305?)/327/350. i just went threw the same probley and my 350 had the same cast numbers

The chance of it being a 302 is almost nil, and it being a 327 is almost as small. The 3970010 casting number was most commonly used to build 350s. Chances are probably 99.5% that its a 350. Also, he said he got it out of a truck so that eliminates the 302 and almost completely eliminates the 327. Dustinweaver, what year truck did you take it out of?

 

yeah true, I didnt read his post closly, just posted what CI's did come in that casting.

 

i have the exact same motor in my chevelle. the head number is 333882 they are 76 chamber heads with 1.94 intake vavle and 1.5 exhaust. motor came out of a 75 elcamino. its pretty fast for a few mods