302-306 basic rebuild not going for crazy compression maybe slightly more than stock..

cams im looking at are along the lines of a 545-550lift intake and 555-565 lift exhaust with a 110-112 lobe sep

heads....going cheap..i know i know... lol
either gt40's or gt40p's so about the same both with 1.6 rockers.

basic aftermarkey efi intake and usual other supporting mods...

So what kinda springs should i be looking at? I would like to take it to 6k rpm maybe slight more.

AFM high rev's with steel locks and retainers? I dont think ill need titanium bits for the locks and such
Maybe some other brand dual springs?

I just want someting that will last and i wont have to worry about float above 6k rpm but below 6500 of course. So let me know what you guys think.

Thanks, Vince