Do the intake spacers help or hurt the performance...?

Currently I have a 1" spacer with the setup in my sig simply to clear the wrong valve covers Summit has sent me...They look so cool and Summit sent me the spacer for free after I bitched them out...so is the spacer hurting my performance? I made 291RWHP and 322RWTQ untuned but the heads were ported and polshied with bowl work and the intake runners have been opened up to fit a 1262 Fel-pro...also the lower intake has been port-matched to the heads...any ideas as in regards to the intake spacers?

BTW: the valve coves I have are the FORD RACING polshed ones that are made for the carb motors...they look really cool...

Yeah...that's what I was thinking, however, there are people that say the intake spacers actually hurt performance...I don't know...it's just that I am so close to brake the 300RWHP mark it makes me crazy...since the dyno time I have upped the timing to 18* from 16*, added my water pump underdrive pulley in hopes to get the 9RWHP I have been shy...and that intake spacer really got me thinking...I'm sure you don't remember the day you broke 300RWHP but to me it's a big deal...lol...the magical 300RWHP mark...