i have a 305 too. if i come across a 350 im taking it, i advise you to do the same. i think holley makes a better quadrajet carberator, that is an easy economic way to improve acceleration. it should bolt right in place of your fuel injector. by the way maybe someone can help me...my stock carb is like 500 cfm i think, if i replace it with a holley should i get like 600?