i finally tracked down parts and got the carbs rebuilt besides for setting the float valve. i seen the diagram in the clymers manual but it only shows to mesaure to the highest point "center" of the round floats. the 68 carbs have flat bottom floats so when you tilt the to get the floats to just touch the valve needle it give you and angled surface to measure off of.Im not sure which point to measure to. any info asap would be great. what is the height measurement specification for the 68 models, .75?