Upgrade to Crate engine HP?

[k-nuts]

1970 Jimmy 4x4 2.5” all spring lift 33” tires. New thread, since different question.

The turn key zz6 405hp GM crate motor is at my top end of my engine upgrade budget. But is that too much HP for stock driveline??? I would have 350trans rebuilt to handle. Have Stock 205 xfer. Stock axles and driveshafts. Haven’t verified gear ratios and if the spid mentioned “posi” is still in there. At a minimum new joints/shaft.

Not planning on any crazy muddying, rock crawling or racing. But also don’t want to be sitting on the grenade scared to push the pedal ��

Also Not wanting to chase parts for axle swaps, LS conversions, etc. Looking to put crate engine rebuilt trans and drive.

Reason for zz6 was the heads and being roller cam & lifters and of course the extra HP I know I could save $ possibly having something built or getting a different engine and changing cam etc but I don’t have a relationship with a machine shop. And like the warranty on the GM crates.
Free time is what’s limited.

Thanks