...... Wondering what modifications, if any, are made to the cases when installing a 103" SE kit.
.......... does the stroker crank just bolt in or is any modification work needed (other than bearings & small parts)
..... any other stuff to think about when considering this upgrade (besides another vendors larger kit)

 

as long as the 4.375" lower end is for a 99-06 lower end,theres no mods,just put it in (I would recommend a Timken conversion though)

 

Plug/play, and as Kirby said, either a Timken or a S/E "Lefty" bearing.
Scott