The 1178 crank mandates the use of the L2210A piston (or any other manufacturer's 302 piston) due to the pin location required when using the 3.00" stroke crank with the standard 5.7" C-C rod length. You also know that this is a late '68 to '69 era 302 piston - 67-early 68 used a different appearing dome arrangement, very distinctive, you can tell at a glance what years they fit. Early pistons were also press-fit pins rather than the floating pin arrangements for the later (2nd design) pistons like you see here.
Regards,
Steve