now it's gota be a series boy,s surely .....itt'a sound something like this...a15 bored,flat top pistons[sorry about this dogerman]so you can take 90 thou off.cyl head at least.extensive port work[getting on the race spec side hummm yummy's].at least 40-80 BILLETcamshaft[checklift for valve ciearance]geni tuned 4 into 1 extractors ,open up face plate to suit porting,2&1/4 in mandrel system yes 2&1/4 in you'll need it single muffler[make sure it's not reduced down inturnuly[crossover pipes most are]i prefer stright thru loud though.debur eng block includes all casting marks it makes them stronger [ask some of the drag boy's]debur ,smoothen then have rod's shotpeened[for stengthing]deburred & matched ported intake[to cyl head & carbs].lightened flywheel. and make sure it's balanced.crank angle sensor 4 coils &elec/ingition.AND AS DATSIK SAID THEM THIER BEUTIFUL 40-45 SUCKERS BUT WITH TWIN TURBOZET'S TO HELP MAKE IT MORE RESPOSIVE IN THE LOWER REV RANGE[THYE DONT HELP UP HIGH] SLURP,SLURP ,SLURP. now man that sound's like music to my ear's,A SERIES MUSIC,.,LITTLE GRUNTER,.,.[HUMMM MIGHT HAVE TO PUT S/ WAG BACK ON THE ROAD I'M GETTING EDGEY]p.s don't forget surface gap racing plug's...