While Kuririn and Yamcha weren't worlds apart compared to Young Piccolo Daimao, as implied by them still tracking weighted Goku's movements, they are still considerably below, as they were surprised by their initial exchange (where all they had to base their prowess on was their speed) and baffled when Tenshinhan commented on how Goku is slow. So if they have made moderate gains in those 5 years (Kuririn is implied to have powered up considerably considering his advantage over Yamcha), I think they are approaching Young Piccolo's level, with Kuririn being basically there.
As for Chaozu, if we take Roshi's statement on him not competing with the Z fighters as also applying to Chaozu, he should be above 139, unless we assume Roshi has underwent a considerable power up since the 23rd Budokai (which can be made a case of based on him being apparently confused at the scouter reading indicating Kuririn could clobber him). We are left clueless towards Yajirobe's power, as he has presented little to nothing beyond his introduction, being easily one-shotted by Shen. Maybe one could make a case for him being at least above ~40% old Piccolo Daimao, as he still accepted the invitation to participate in the Tournament already knowing Goku got powerful enough to outclass that display of power.