Re: 165 hp engine coupler
Use part number 982458 for 1973-76 Chevy V- 8. Use part number 982511 for 1973-76 100, 120, 140, & 165 hp inline stern drive.. Use part number 982458 for 1973-76 Chevy V- 8. Use part number 982511 for 1973-76 100, 120, 140, & 165 hp inline stern drive.
I see the 982511 number changes up to an obsolete shaft and coupler that was $700 before it went NLA
0982511
Replaces OEM #0982511 DSHAFT&COUPLING
Replaces OEM # 0982511 $700.00
I think you're going to have to do some field engineering - measure what needs to come off the end of the intermediate shaft if that will solve things and take it to a machine shop (will probably have to be ground as spline will be hardened), or keep an eye out for the old vintage coupler, or modify the coupler, matching it to the old one. There's no "in the box" fix. Measure twice, cut once.