geonc
SPIDER BAIT
Actually,I don't know if that is a 16V71.Looks more like a 16V53.THe valve covers are not 71 series style unless industrial engines had different covers.The 71 had the same as a 92.Cast aluminum with flat top and an angled down shoulder(unless it was a jake engine then it had a more inverted V shape.


Easy there Freight 
Those rocker covers are the old style stamped metal....you are thinking of the alloy covers that replaced them in the 80's.
...and FYI---to my knowledge,Detroit never made 16v53's that went to production....plenty of 8V53's both n/a and turbo for military and marine.
HOWEVER---there were some 24v71's built! 2- 12V71 blocks bolted together---using 4 6-71 heads!
another tid bit---the 8V53 turbo engines in track transports actually used a spark plug in the air box

AS for the double blowers, 12/16V 71's and 12/16V92's and 12/16V149's all have them
In natural asperated version such as shown they really only produced less than 500 hp at rated load speed of 1800 turns


; what are you, some kind of hemorhoid inspector ??