i have a 400 bored .60 over with afr 210 heads fully cnc'd to 221 i have .125 domes and 64 cc heads i have a bowtie intake anyway .. with my throttle wide open and all plugs out i have 160psi at 6 compression strokes while cranking seems a little low to me .. my cam is 256 266 @ .050 with 625 625 im running 1.6 rockers to give me 666 666 lift . im not happy with the performance of this . im checking my valve springs to see if they are set up right even thou i know it wont affect cranking pressure. i run 105 mph in the 1/8 and 122 in 1/4 and weigh 3100 and has a 5000 convertor/glide with a 4.10 gear. it seems to struglle above 6000 rpm's and i think i have some issues to look at. im open for a cam swap even if i only go solid not solid roller like i have now... any help or examples would really help im sort of stumped where to go now ... thanks oh my cam is on a 105 and i have it installed straight up at 104 ... my deck heigth is about .015.........ok now today i noticed that if i have the timing at less than 36 degrees it acts like i have a miss but if i bring it up to 42 it sounds and runs fine , but it didnt do this a few weeks ago it just started it .. i ran it at a 11.11 at 123 before at 32 degrees now it'll hardly run there . come on guys im depending on you professionals .. thank you.