old motor in a new rig?

[buffblazer]

so it should be a simple question right? could an 86 350 block be used if all the upper end parts came from a 99 350?

grandparents threw a rod on their 99 gmc yukon and they are kinda tight on cash, i have the 350 from my 86 k5 that i swapped for a fresher one and im needing to know if i could take that old block and swap all the parts (heads, intake ect ect) onto this motor

the 86 350 was running when pulled just had a head gasket leak so its in good shape and they are just wanting to get it running so they can sell it.


what yall aged mechanics say?

 

[dhcomp]

Its not legal, smog wise. But if it passes the sniffer, is anyone going to check the numbers? Probably not. But i DO NOT know if you can bolt all the vortec top end on these. I'm thinking not.....

 

[79rustyk10]

there would not be a place for the crank position sensor.

 

[us74k5]

I swapped dang near everything from a 99 vortec motor to my 74 block. From the heads up that is. However my vehicle does not have to pass emissions, so I would not know what to tell you about that..