whats my Horsepower gain with these mods?

From mid-1961 to 1963, 50,000 225-cid Slant Six engines were produced with an aluminum engine block. These were discontinued because production was slower, more expensive, and not as reliable as with the steel blocks

The Hyper-Pak was available for the 170 and 225 slant sixes. It had a radical cam, Carter AFB 3083S four-barrel carburetor on a long-ram intake manifold, steel tubing exhaust headers, higher compression pistons, and a special exhaust. Advertised at 195 hp (gross output, for the 170), Hyper-Pak engines were the rulers of the lower stock classes at the drag races, and the Hyper-Pak was available from dealers.
~~Compression ratio: 11.5:1 (225), 10.5:1 (170)
~~Brake hp: 195 at 5200 rpm (225), 148 (170) (factory specs)