Engine Build Help Small Block Guys

ALRIGHT first off this is what they guy said "Block +30,cast flat-top 30 pistons w/moly rings,reconditioned floating pin rods w/SPS bolts,forged crank cut 10/10 w/bearings,1pr.77(?) 318 heads and 1 pr. 273 closed chamber heads.Pistons,rings,bearings new,not assembled since crank was cut" What are sps bolts, forged crank is good right, pistons are 30 over if i understand that right, are moly rings good and floating pins, why would you grind a crank and what heads do i use understanding both will need work heads on the 273 will need unleaded seats what would i have to do to mount the 318 heads on it can i use a 318 timing cover and oil pan ill be using the electronic ignition orange box with stock distributor ill be using a edelbrock intake performer CLICK HERE TO SEE IT becaus i already have it what oil pump timing chain all that junk should i use And what cam its a 4 speed 3.55 gear in a 66 valiant il probablu use a stock 4 bbl holley carb of some 70s or 80s car that im rebuilding out of a junk yard. Thanks guys
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