NGK vs. AC Delco spark plugs

[70 Forest Green Zee]

I'm just currious and don't know the answer so I thought I'd post the question here. I've always used AC Delco plugs in my 70 Z28 with the stock LT1 engine. I've heard so much good about NGK plugs that I decided to try a set. My question is this....the electrode on the NGK is substantually longer than the AC Delco plug....will this cause any problems? The pictures below are an AC Delco R43, and an NGK XR5 V Power both of which are the correct plug for my application. Your knowledge is greatly appriciated!