I ran into size variances way too much when i was into my 4x4 lifted 29.5" tire phase. Some sizes are off well over an inch either way, i would call companies yourself and ask for an exact measurement but dont let on what size you want to hear, make them be honest about it. i know my GNCC's run short, front and rear.
1999 400ex -- Sunday driver ----****SOLD****
Wiseco 426. 11 :1, Hotcam Stage 2, Curtis Sparks X-6 full exhaust, Houser 450r Probounce nerfs. (black silvervein) Holeshot GNCC's on T-9 Itp baja, Maier carbon fiber plastics, Houser antivibe stem with Renthals/ODI Rouges, Lonestar doublerow carrier, 170 main no lid -- 50/50 turbo blue and 93. '07 450R shocks
2005 450R -- The Sleeper --
Bumped up compression, stage 2 hotcam,hotrods bottom, Dasa full system, uni filter and jetted, stainless brake lines, rath nerfs and heels, quadtech hood, Fluidyne radiator, ported and polished, houser grabbar, Hinson'd out.