post some pics of the basket
I would get a clutch from FAST racing. a great site sponsor on here.
yes you can file some grooves out if the're not to deep.
my Fast racing ported 4mil had no top end with the fatty's I put some R2 pipes on it and re jettet and it is a monster now.
amsoil dominator oil mixed 50 to1 is what I use, with great results.
Kevin can cut your domes for the 4mil and pump gas. you should be able to run stock carbs for now, and get carbs later, if you do 110 rod 4mil crank you can use the pistons you have now.
that sounds high priced for a carb clean to me.
get a clymers manual and learn.
jeff at fast racing has a great clutch for around $80
jlsparky proly has a youtube vid on clutch replacement, he has a lot of diy vids
and the slides pealing and sticking, lots of problems on the blaster forum with them, but they are cheap so guys keep using them.
I would get a set of stock carbs bored out to 30mm