I love the A series as well, but wanted the lil Sunny to be powerful but with the driveability that can only come from a stockish motor.
I was never going to get that from an A series, and chose the SR as it's newer and has 200cc of extra bragging rights..

i dont know?, because the the best motor for power was / is the FJ, i'm not a fan of alloy block & OHV motors.

both great engines including the a series. The CA is getting harder to find off the shelf and resonably priced perfromance parts now. I think the CA and the 1200 are a great match, but I went SR due to the wide variety of parts available and engines are only $500 for a good one (stock).
Mind you the SR was a dog to get in the 1200....ah I love the A series...

i hate both. want my opinion? keep the a series

hey guys why is there so much ca vs sr hatred i love the ca18 i think its great for 1200 and other small datsun, but every sr owner wants to hate bcause they had ca18 in a ####ty heavy silvia and think ca are no good wtf is the go with these people? i had a guy at tyre shop tell me to put a sr in my ute coz his 1600 had one and was better he didnt like ca coz not powerful enough, mind u he weighed about 160 kilos hmm any thoughts people.