not sure were to post this I have a 1978 chevy rv van front Itasca rear sleeps 4 bathroom shower.i use it to pull my jeeps on a 20' trailer I was just want to be able to get up to 60mph a little quicker once up to 60 to 70 it rides nice. it has a stock qjet 4bbl. what mods should I do torquer intake header ??

 

put a dual plane intake and a eldebrock carb and a rv cam .i assume it is a automatic ,if you ever have the trans out put a rv torque converter .