AE86 4A# crankshaft pulley bolts

[oldeskewltoy]

Since I'm building another weird mix of parts... I did some research on crankshaft pulley mounting bolts.

There are 3 listed for the AE86, all say 4A# which means fits ALL 4A engines(4AC and 4AGE)

90105-12012 - May 1983-Jan 1986 (well into 4AGE engine availability in this chassis)
90119-12101 - Jan 1986-August 1986
90119-12127 - August 1986 through June of 1991(AE92 end in USA)

Now here is the odd part....... ALL 3 are still available and there is NO supercession!!!!

[oldcorollas]

all three give different clamping forces.
in your picture, from bottom to top, the size of the head of the bolt increases.
larger diameter head will allow it resist undoing better.

i would guess to go for the top one.