i am running stock intake and cam but i am going with a cobra intake and steeda #19 later on. will have fms shortys 2.5 mac exhaust all the way back. how much rwhp/torque can i expect to gain with a set of highly p&p e7 heads with 93 cobra 1.7 roller rockers? also will the pushrod length be the same for the 1.7's? thanks in advance for your help