302 heads
The "302" is the last three numbers of the casting number found on the head under the valve cover. They also have a very distinctive heart shaped combustion chamber. They can be found on virtually every 2 bbl 318 from the mid 80's until '92 when the magnum came out. If you find a 4 bbl 318 in these years they will not have the 302 heads on them. These 318's had 360 top ends on them.
These heads will add about .5 to .75 compression to a 318.
Chuck