So if you wanted to order just 10 hipos from Ford, how would that work? Have some guy on a fork lift go down the assembly line looking through the 289's and picking out a random 10? Was there a different assembly line for each type? 260's here? 289 2 barrels there? 289 hipos over there? With thousands of engines being built, how do you select out just a few?
Engines would have been routed out of the engine plants not the car assembly plants. From there they were moved by rail to where ever (car assembly plants, parts depots and so on to where they would be sent to their final destination or to the retailer as I understand it. Sometimes these orders were not for regular production motors but it depended on the connections, agreements and specification. Often different from one another so getting specific, if your looking into one of those, might be difficult unless you can uncover some ordering documents or invoices. Just depends.
Here is a shot of part of the inventory Holman and Moody had on hand at one point. Posted this picture back in the old Forum
Note these appear to be engines ordered for a specific purpose so many of the features do not match engines installed on production cars
If you wanted a handful of new motors you could just start with your local Ford dealer and go from there