V8 swap rear diff question

[Phenomenon]

Hey guys, I have an 81 280zx non-turbo that i am going to drop a 350 chevy V8 into with a turbo 350 transmission.

 

My main question is how much abuse will the stock rear diff and axles take?

 

I'm not positive but i think the rear is a R180 open diff...

 

 

 

Also is the factory tachometer adjustable so it will read the V8's rpms properly?

 

Thanks, Gordon

[BRAAP]

Gordon,

 

I'll toss ya a bone while tossing this in the shed.

Everything regarding V8 Z car conversions including using the stock Datsun instruments with the V8, mounts, suspension, exhaust, cooling, wiring, etc is covered in the JTR manual, including adjusting the factory tach! HybridZ rule #11 covers V8 Z car conversion and the JTR manual, please get the manual before asking any more V8 conversion related questions.

 

The Datsun Rear end is weak, VERY weak. In stock form as used in the car pictured below, will just barely hold up to your everyday 750+ HP dual quad, supercharged Nitrous fed Small Block Chevy running 8 second 1/4 mile passes. Push it much harder than this such trying to flip the car with power and traction only, it might fail, i.e. its weak. Possibly fail with slightly less power, say just a pansy weak sauce 500+ HP supercharged dual Quad SBC minus the NAWZZZ if you are abusive on launches or gear changes. The R-180 will handle a bit less than that, like a sissy girl 400 HP SBC minus the blower and minus nawzzz...

I think you get the picture, pun intended..

 

This pic is for real, no enhancements other than text added to it. Owners/drivers are brothers and members of this forum! JnJ

 

 

Now get the manual and start reading.