454???427???what do i have???
just bought a big block assy. trying to find out what i bought! block is #3999289 with factory 4-bolt mains-tapped for oil cooler-high performance pass.-1972 date, crank is gm#3967811 with 7115 cast #, has dimple rods, has gm#3947886 dome pistons, cam i do not think is gm? has 4094 & 1142 stamped on back. i know block is 454 and ratating assy is 427. is this a crate or over the counter engine or did someone put it together? i have read about a code ZLX engine build between 1970 & 1976 sold as a replacement engine. anyone know if this is what i have maybe?? anyone know the block cast number on a ZLX?? any info appreciated, thanks, mike