the holley street dominator is a killer intake for a SB 318
single plane,low rise.small port intake just for a teen,be surprized how well it works on one being a open plenum
the edelbrock LD4B is another killer intake for a teen
duel plane,high rise,small ports and is a big boost to performance
I run that one with a 600cfm and voodoo roller cam,headers in a 85 stepside
big bump over a stock 4-v
a stock 360 intake will work with good results but does have the large ports...done it many times on a 318
i run a lot of 318 with the 360 heads also with a stock 4-v intake and q-jet carbs
IMHO..best bang for the buck..LD4B hands down
then the holley street dominator
both very good intakes