340 Stock Camshaft

I have two Holley 750's right now. A down leg booster and one annual type booster 9379-that seems to help low speed power-which already was great.

My mileage was 10 mpg with the 318 heads, then with the 360 heads and a single plane Holley street Dominator intake, it went to 9 mpg. Now with the RPM intake its back to 10 mpg, maybe 10.5 and has more power than ever.

My cam is 30,000 miles, 6 years old, so I guess my chain is loose-timing does move at high rpms, 4000- no race motor. The cam must have seen its better days too, so I might be doing a in the car cam swap soon. Done it before, same car. Cam slips just out without removing the grill-no A/C.

It has adjustable rockers so I am open to either a H or M

I just need to decide what to get :geek: