That's because it doesn't exist in the Master Parts Catalog as far as I can tell. (I have my MPC OCR'd so I can search for things, but the OCR'ing isn't perfect so there's a remote chance it is there but I can't find it.)
First, E2T
B tells me that's not a part number - at least not one for our trucks. Instead a part number for our trucks would start like E2T
Z. But, many ID #'s start E2TB. And most parts don't have their ID # shown in the MPC, so it isn't surprising that I can't find it.
But, Numberdummy gave me several Master Cross Reference List books which let me convert ID #'s to part #'s. However, there are no 1363100's in it, regardless of prefix or suffix. It skips right over that #.
Having said that, in the MPC I do find 1
563100. That's a "spring - full width seat" for a regular cab truck. On the other hand, I cannot find 1563100 as an ID # in the cross reference book. And finding part number and then correlating that to an ID # isn't easy to do in that book.
(I just had a thought. My new scanner does both sides of a page at the same time, and I did 54 pages yesterday in 35 seconds. So, if I were to scan the whole of the 1985 cross ref book which has 1061 pages..... My math says that would take 11.67 minutes scan time. But the OCR'ing takes several minutes per batch, meaning the # of pages you load. So, it is feasible.
)
Gary, AKA "Gary fellow":
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Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI