What should i change to get into high 11's?

less weight, more hp. your wallet will be lighter haha.

smaller engines need more gear for launch. so yeah what bob said.

since it's a street cruiser you are limited by your fuel. stroking the 360 up or moving to a big block will definitely be the easiest ways... neither are cheap. even keeping your 360 in order to make it run high rpms that you will need with your high stall and 4:10's or whatever gears will cost a lot of money. it could be done that way as well. high flow heads, aluminum preferred. external oil system. solid cam / adjustable rockers / correct lenght pushrods.

so small block / stroker / big block all 3 could do it but it's all what you want to spend.

bob's solution is the cheapest. you could just go with a .600 cam like he says, and get everything fitted while you got the heads off. the right springs for the cam etc.

*** the cheapest way to go would be if you find someone selling a set of sb aluminum heads all ready done up with adjustable rockers and big springs already ;)

check with MRL Performance maybe he has a set around. or pm IQ52

just be careful i would only get a set of heads from someone you know wont do you wrong... you dont want a set that has been abused. cracks, too much material taken off, etc.