rpm airgap vs the m1 single plane

depending on your budget...

i'd stick with what you have this season, work toward consistency. race skills.

instead of tweaking, changing, retrofitting intakes and stuff, find/get a higher compression engine ready for next year.

the 360 base compression is not so hot. the x heads were good back in the day. but now they are not optimal.
no amount of porting and tweaking are going to give you huge improvements.

shoot for good compression, like 10.5:1 or so, a set of alum heads, a holley 750 double pumper, good fuel supply. chassis/slicks that hook. work toward that for next year.

your best bet would be look around on here and moparts for someone getting rid of a good small block, upgrading their car to a big block. in other words, if they already have a running small block 360 that they invested in, had all the machine work done, and have aluminum heads on it you can get a heck of a deal if they are upgrading to a big block or new hemi or something.

just my opinion. small tweaks to intake/cam will not get you into the 11's. or carb jetting. you should set your goal for 11's, plan & seek and snag a deal on an engine. run what you got for now, save a little bank, and jump at the chance when you get it.

that being said the air gap is gonna do well for you. what's sitting on top is important too.