1600 tall block 681F

[fjbm]

Hi all

Does any one knows how much can a tallblock twincam engine rev with a 681F block with its mains but with a 711M cranck and rods?

Will its weaker than 711's mains stand 7000 rpms well?

Thanks

[qedmotorsport]

If the block has round caps, you would be looking at around 6000rpm. If square caps, 6500rpm. It would not be recommended to use those mains at 7000rpm.