The big choke is PN HTS 8039. I don't see any reason not to do it this way. There were a few things which were specified at minimum price and complexity. Make sure you specify the type of endbells you want for the choke, I had a nice pair of vertical ones from my salvage bin and told them to put it together any way they wanted...The 'Swiss Army Knife' sort of Power Iron and the big choke will move things nicely up the performance ladder. In my book, $350-500 is a reasonable parts bill for a simple linestage.
With labour and profit margins, a $350 parts bill would work out to something like a $4k linestage once it was properly dressed...
regards,
Douglas