ok i've got my block here and on the stand, #'s need decoded.

mortec says its a 69 396 or a 70-71 402.

casting # 39699854.

date code(assumption, pass side of block above bellhousing) D13 70

behind flyhwheel on back: Hi per pass. F7

front pad: T0504 CTW 10R245970

See: http://www.nastyz28.com/spmenu.html &
http://www.nastyz28.com/decode.html

CTW along with your other #'s = 1970 high performance (L78) from a nova, chevelle or Camaro. R = arlington, which built chevelles.

So, it's a 1970 Chevelle 350hp "396" (actually 402)

ya know, one of these days i'll figure out you have all that stuff on hand here.

good stuff, now if i only had the guts to fill the block...