hello everybody
i am currently on the look out for my summer project
and of course it will be a third gen Irock-z
now before i make the purchase i have a few questions
is there a way to tell if the car has posi or no
just by looking at it or the only way is to jack it up and spin the wheels ?

also how can i know for sure if the engine is a 305 or 350
any distinctive features to look for ?

i want to make sure the one i get has a posi and a 350 in it

thank you in advance
hopefully in the next months i will post pictures of the project at hand

 

Welcome to TGO

Jacking it up and spinning the wheels is the easiest way. Puling the diff cover off for a visual inspection is the best.

Look at all SBC engines sizes and they all look the same externally. Casting numbers are the best way to tell if it's a 4" bore block used for the 350 or if it's the smaller bore block used for the 305. Far to many people have purchased a car because the previous owner claimed it was a 350 only to find out it's a 305. Suffix code numbers can tell if the engine is original or not.

 

thanks for the quick response
now where do i find the casting number on the block
all i know is that is should be somewhere on the driver side
none of the other threads have shown it

sorry for the kinda dumb questions but this will be my very first hands on project
and i am just learning as i go along

 

casting numbers should be on the top/back of the block, driver side, directly behind the head

 

ok thank you for the confirmation