zoom flywheel questions

I found a zoom flywheel on summit racing website. Its a 130T , for a 10.5" clutch, 6 bolt , neutral balance. Would be perfect for my 318 build, but it says it fits 318s from 1985 to 1992. Part number is 50-3409 in summit catalog. I think this is a zoom part number.

I am wondering if theres really any difference between this and an application for a 1974 year model 318. All the specs are what i am looking for except the year model fitment is throwing me off.

Anybody know if this part will fit and work. Price is right on this one. Id like to know 4 sure before i pull the trigger on one of these.

Thanks in advance
Matt