Leaf spring question

[Slow Ride]

So which leaf springs would work best for me? I go mostly straight line racing with the Blazer, but do street drive it to and from work,cruise-in's, etc... The slapper bars are getting kind of old and I'd like to drop the ride height a little more with a frame notch and maybe 4" blocks or a leaf spring relocation.



Later on I will be doing a G-machine build up on the '77 Pontiac and will need to do leaf springs there too.