I see 2 different sizes of belts for my car. ( 88 formula 305tbi )

Part # ending in 980 - 98 5/8" belt

or

Part # ending in 945 - 95 1/8" belt.

whats the difference? one w/ and w/o A/C?

I don't have any custom pulleys.. just a A/C Delete pulley, shouldn't make a different its the same size pulley as the old A/C Compressor, so im just looking for a stock belt, i think the 98" inch is the one i need.

 

Also, i need the belt routing for 88-92 TBI engine, with A/C, since i have a delete pulley on there it's not completely gone.

Do i need the 98" belt or what? PLEASE HELP!