i have a set of these heads with 1.9 and 1.6 valves, 550 lift springs newly rebuilt.... ive done sum searchin and found out that these heads pretty much suck. what should i do? will they make any more power then my stock heads? what if i plan on gettin a sc trim in the future? i paid 240 for the heads, shortie headers and chrome valve coversa what do u think?