Good mod. I had the Vax version in the UK for many years known as "Vax Quicklite V-046." I adored it. It didn't have a hose on the back so it was a true upright vac only.
I know Dirt Devil in the U.S had about three versions, one eventually had the hose on the back of the Plus model. But bear in mind it had an 850 watt motor and with a paper pleated cone filter inside, suction air flow can only go so far.
The added hose you've put on it looks far better and far more purposeful but the true test on its power and suction will only be known once you've actually used the hose and any added attachments.