Proper fittings for the block and original oil line- no modifications required. Fits the original retainer clip and bracket. Correct threads for the block of course!
 
As you have come to expect, a superior product from DatsunRestorationProducts. 
Designed to be easier to install than the original hose and the cheap knockoffs from the budget parts source.   
 
This is a heavy _duty improved version, specifically designed to be easily disconnected at the block or the line for easy service-That's not possible with the old style original line or budget crimped versions.
 
Our clutch line is made the same way- Far easier to install and service:
https://www.datsunrestorationproducts.com/product-page/clutch-slave-hyd-line-aeroquip
 
Fantastic AN quality, not some budget/cheapo  made at the local LA hydraulic shop (or in China) to maximize profit!  A better part-not a budget part.