my hollander interchange lists that PB 8-283 4BC Chevy II 65
V0416
Flint, O4 month.. april 16..
what is the casting number off the back of the block above the transmission mounting flange..
look also for a 4 digit code back there also .. the julian date..
with a april 16 casting. perhaps 65
you are going to find a julian date like D115 or D125
D would be April for the 4th month.. the 5 would be the last year of the decade.. 1965.. 1975.. 1985.. with the casting number.. those usually don't last more than 10 years of production.. except perhaps the 010 blocks.
most of the blocks i have cross dated online usually only sit a day or two before final assembly.
283 engines might be any of these casting number
Block #: 3556519, 3731548, 3736935, 3737739, 3737789, 3756519, 3756935, 3788935, 3789187,
3789817, 3789935, 3790721, 3794226, 3832338, 3834810, 3834812, 3837739, 3849852, 3849859,
3849935, 3862184, 3862194, 3864812, 3896944, 3896948, 3903352, 3932338, 393288, 3949852,
3955977, 3959532, 810, 840
if that is an different casting number it might be an ACTUAL 350 from 1986... there is a UPB stamping from then..
so post casting number and the julian date.. if you can..
UPB these will be 4 bolt main 350 main size journal blocks. a PB would be a small journal block. if you could see the back of the crank.. where the flywheel is bolted on... small journal cranks have a ROUND flange.. sometimes with a notch out.. large journal blocks in 86 should be a 1 piece seal block.. no flange.. just sticking straight thru the rear main seal adapter plate.. oh.. yea.. you should be able to see that fairly easily up from the bottom. huge hint.. those series of trucks with manual tranmissions.. and some with automatic came equipped with a FORGED STEEL one piece rear main seal crank.. instead of the cast 1 piece rear main seal crank..
8-350 (5.7L) 4BC (VIN M, OPT LT9) Chev Tr. ‘86 ser. 20 & 30 GMC Tr. ‘86 ser. 2500 & 3500
8-350 (5.7L) E.F.I. (VIN K, OPT LO5) Chev Van ‘90 ser. 10 thru UPL 30 GMC Van ‘90 ser. 1500 thru 3500
in looking at the close up... can you post the smaller row of numbers.. on the stamping pad.. that is the partial vin number.. i cannot read it..
with that info.. i might be able to clarify what it came in..