dumb question

[murraygmc]

i have a 85 gmc sierra 4x4 and it has a 6 cyl the rings are shot wanting to put a 350 in it. its got a 4 speed manual trans my question is from what range of years will a 350 sit and bolt right in i know ill have to get a new radeater an fan shroud thanks

[dumbucket1]

any year 350 will work. You need to change the engine mounts on the frame though.

[Blazin]

85 and newer will bolt right in because they are a one piece rear main seal engine. A two piece rear main seal motor will work but you will have to get a fly wheel that fits a two piece rear seal crank. If it were me I would swap in a bigger diameter clutch, which might require a bigger flywheel anyway.

[eventhorizon66]

I thought '86-up were one-piece rear main seal.

[Blazin]

I have heard that before too, but I had an 85 built 5-85 and it was a one piece rear main seal.

[murraygmc]

whell thanks 4 the info guys