i am looking to build a 28 29 model a closed cab shop pick up truck and i would like to put a mercruiser 120 or 140 hp 181 ci chevy 4 cylinder in. here are my questions: 1.do you need to changer anything on the engine to run it on the street? 2.is the cam good that is in it or do you need a nonboat cam for different rpm range 3.what fly wheel do you use? 4. do you have any hp hop up secretes for them for the street? i will make a header for it and an intake for strombergs so i am not to worried about those manifolds. i just didnt know if anything needs to be changed to run better on the street. the way i see it boat motors run pretty much all out and i would think the cam may need to be changed. i am intreaged buy these little engines .thanks for any info you can provide for me. drew this engine realy lights me up!!! i like the repop ohv valve cover over the top of the chevy.