I don't know about your exact model, but possible the ignition timing is a little too far advanced
Retarded timing makes a car start easier from cold and run up hills etc
Advanced timing is needed for good higher speed running
Sometimes if the timing is too far advanced you can hear a "pinging/knocking" if for instance accelerating hard in top gear, especially if going up a hill
This simple test, is not so easy to do in an auto gbox car (as it will change down a gear on you)
Assuming your car has normal type ignition points (and NOT pointless ignition) then fitting new points, and setting their gap correctly, can have the effect of slightly setting the timing wrong (compared to what it was before, with the old points installed)
One "fix" is to slightly set the points "wrong" (a little tiny bit less or more than the recommended gap)
However this upsets...if I'm right, the "dwell angle" so can only be used to a limited degree.
The proper fix for wrong timing is to correct the timing. Some old English cars had a "micrometer" adjustment using a finger turned knurled nut on the distributor (I used to have my 1959 Vanguard set, so that for cold Winter starts with the handcrank, I'd adjust the knurled nut all the way to "Retard", then wind it back all the way to "Advance" once the engine started.....I never once had any bad experiences with the crank starting handle ! (Heard stories of broken jaws and thumbs ripped off)
Most cars nowadays no longer have that fine "micrometer" adjustment. It's necessary to loosen off the 2 bolts securing the base of the distributor and twist the body of it VERY GENTLY a tiny bit one way or the other
Take the dist cap off and see which way the rotor top turns while having a friend turn the starter momentarily
Now you can visualise "if I turn the dizzy THIS way, the spark happens EARLIER (ie advanced) and if I turn the dizzy This way, the spark happens later, ie Retarded
I notice that my Nissan, the rotation of the distributor rotor is the opposite to what all the English cars I've had is
If possible, use a felt pen or something to mark the dizzy body-base and mounting base before you try moving them, that way you can always return it if no improvement is made
Remember that you only want to turn the dizzy a tiny bit (usually it's a bit stiff and then suddenly it turns a lot and you have to turn it back some)
DO NOT LIFT THE DIZZY UP or the drive thingy underneath will get all out of kilter etc etc, ya don't wanna go there
When my Nissan came back from the Datsun specialist after having some major engine work done (new timing chain and gears, I's thrilled with their work generally) but I noticed when going up a decent hill that it "pinged" very badly
After I got home, I retarded the timing very slightly, the pinging on hills is now "almost eliminated" (which is generally considered to be the right effect) and the car's been going great ever since
cheers Catherine Rural Western Australia