You're very welcome. Yes, the engines are standard to the GM cutaway van series, unless someone has changed it sometime in its life.
The original engine code will be the eighth digit from the left, in your VIN number. The 10th digit will be the model year of production. You can use this site to punch in your VIN, and get more info.
Every day's a learning experience, though sometimes not what we expected.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
2 new fluffy Corgis, Bayley and Stanley