Slant 6 power?

this last picture reminds me that i need to work on the tranny... well i want a just a nice ridding demon for now but ultimately i was a street terror .. mabey after i get a second car... im thinking about adding a turbo and keeping the psi low like at 6 psi like the slant six site said to for greater fuel economy... but i think my original question was more of a thought into the future.. oo and thanks for the input guys