Is it running now? What are your performance goals? If the engine is sound, maybe some pump mods would be a better choice. We avoid Jacuzzi, but the performance can be improved upon. Might give Jack at MPD a call and see if he is still working on Jacuzzi. Just thinking bang for your buck. It's difficult to make noticeable performance gains with bolt-on parts unless that bolt-on is NOS or a blower.
If you like to tinker and want to learn about your engine, pick up a nice Cloyes adjustable timing set, degree wheel, and indicators and spend some time degreeing your cam. Advancing it will build more cylinder pressure and rock the power curve about peak torque, favoring lower RPM. Retarding cam timing will build less cylinder pressure and slightly favor power above peak torque.
My concern is that your engine probably has flat-top or dished pistons. That will equate to low 8:1 compression ratios. A bigger cam, heads, intake, carb, etc. without the compression to back it up, you could end up with a fuel hog that doesn't have the performance you expect.
A moderate investment of a set of Crane Gold high-ratio rockers would like a little more cam, but you could open a can of worms with valve springs and retainer clearance.
Good luck,
Joe
