Bolt Size 273 Block

[Bossanova5]

Does anyone know what size the bolts are (Thread size) in the back of the block where the transmission bolts up to?

I need to buy some long bolts so I can put the engine on an engine stand.

Thanks

 

[killerslant]

3/8x16 for the threaded ones.

 

[junkyardhero]

^^ KS got it.

don't forget some properly sized washers

 

[Bossanova5]

3/8'' is pretty small...
ok thank you

 

[cudamark]

Get grade 8. If you plan to flip the engine up side down, get longer lower bolts and nuts and washers to match.