whats my Horsepower gain with these mods?

I agree 100%. I got about 800 clams in my head now. A SLANT head. LOL But it's gonna be fun as hell. How do you put a price tag on fun?

oh i'll say it

slant 6 = reliable fun motor not meant to be a hp powerhouse out of the box
costs money to make them put out good power but it can be done

the mods proposed will give a very slight gain, but may provide a smoother running car and more reliable if it's a fresh carb tuned properly :D as opposed to an aged 1 bbl that may have problems

i aint afraid to be politically incorrect. slant 6 is a good, fun, reliable motor but it costs money to get big power out of them. and i'm not being venomy