with more cam you will lose low speed vacuum. it will hurt driving economy and increase emissions if your state has roads side smog sniffer they might sent you a letter, usually for off the line throttle response you will need more low speed advance. just cranking the distributor to 16 or 18 degrees will give you to much at top speed you need to get the distributor recurved and limited total advance. old trick from the 50's i was an engineer at ford, drove a buick powered willys to work every day. had a corvair powered dunebuggy but eventually did buy some new ford products when the finally started giving employee discounts( cheaper than the dealers factory cost)