a few questions for a restoration

[drivethechevy]

i just was given a 1970 chevy c/10 with a unknown size v8 a 3 speed manual and a 307 ratio rear end
now my questions are
how do i tell what size the motor is?
i was told by the fella that gave me the truck that he knows for shure its not a 350 and that he narrowed it down to either a 283 or a 327. how can i figure out if he is right on that or not and the acctualy size?

also the truck is not running and i wanna know if the 307 rear end (which is a 12 bolt) is a posi trax. so what should i look for with out taking it apart to find out? and what should i look for if i do take it apart?

another thing this is a 3 on the tree and the colum does not seem to have any variations from the automatic colum i have in a 68 c/20 with a 6 cylinder. so what i would like to know is could i switch the trany fro m maunal to automatic without a new colum? and if that is possible is there any special things i need to do for it to work?

in your own opinions which motor would you use for this restoration to a nice daliy driver, i have a 350 out of a 68 gmc, a 283 out of a 65 impala, and whatever the motor is in the 70 that was running within the last 2 years where as the others havent in atleast 10 years but were stored correctly. all motors r not running but r not stuck.
which would u chose to rebuild for a daily driver?


if u can help me out with this it would be great because i am just starting out working on vehicles, and i got a 68 c/20 with a inline 6 that i drive with a far from straight body, then a 68 gmc and a 70 chevy with cab rust issues that i am going to use parts from along with a cab from a 69 c20 to build myself a restored daily driver

[energiesource]

if its all stock, you should be able to check with the vin number.

[brak]

on the front of the motor, Passenger side, there is a pad with the casting code for the motor. you can look up that number and it will tell you the size and year of the motor.

If your alt is on the passenger side, you may have to remove it to see the pad

[drivethechevy]

ok i looked on the front passenger side andi found the pad
the only stamping there was said F6IID
where should i look to find out what that means?

and it turns out the truck is infack a 69 not a 70 like i had been told

[brak]

when in 69 was it produced?
If it was produced Aug or later 1969, then it is a 70.

on the pad you may have to scrape the paint off. I like to use a razor blade, as it leaves the paint in the grooves, making the stamp easier to read...

[kbs71]

Go here http://www.mortec.com/ and all will be revealed (maybe)