Yes, a 350 engine with casting number 3970010 typically features a one-piece rear main seal. This casting number corresponds to a later model small-block Chevy engine produced from 1986 to 1995, during which time the transition to a one-piece rear main seal design was implemented. If you're working on this engine, you can expect it to have the one-piece seal configuration.
86 or 87 305 with one piece rear main seal.
Goodwrench crate motor 350, Made in Mexico, 260 hp, 2-piece rear main, 4 bolt main caps.
If it is newer then a 1986, yes it doe's have a 1 piece rear main seal.
Yep, they have one. 1986 and older has a two piece rear main seal. 1987 and up has a one piece rear main seal.
A Jeep 4.0L has a two piece rear main seal. You have to remove the oil pan and rear main bearing cap to replace it.
does a 93 f150 have a 1piece rear main seal
1986 and older are 2 piece.
YES it does. Must remove oil pan, Oil pump and rear main bearing cap to service the rear main seal.
14093638...350cid...87-95...2 or 4 main cap bolts...Roller or flat tappet cam, one-piece rear sealcopy and paste this link http://www.boxwrench.net/specs/chevy_sb.htm
yes it does yes it does
Yes this is a one piece for the 96 bronco
pull trans. fly wheel one piece rear main seal not a job for a shade tree