318 build with XE268 AND 302 heads

AJ..Ok, I hear ya.
Hi..I have a 76 318. Planning to add 302 heads. will add headers and dual plane intake along with 2.5 exhaust.
Stock rear is a 2.76, but that will change.(probably 3.55) Auto 904.
I love the sound and specs on the XE268 cam. Any cam kit runs $400-$500.(springs,lifters,chain,cam)
I could spend under $500 on an adjustable rockers......IF that's what's needed for the XE268, but not a grand. If that's the case, then I need to go with a diff. cam.
I appreciate the input.