based on your knowledge, is it feasible for a 33 year old to have been recruited into the Pilot training programme
The Americans I've talked to find it questionable, doubtful, and not believable, in 1967 the age limit was 30, don't know what it may have been in 1970. In any event, 1970 doesn't matter, because he most certainly didn't serve in the unit post January 1970.
The unit only served in Vietnam for four and a bit years, having been formed in Vietnam on the 29th September 1967, and have been a fairly close knit bunch up until very recent years. Thus far I've been unable to find any one who has heard of him in three of those years, but still have one response to come.