double check your valve adjustment,if you're using really heavy springs consider lighter ones for the break in but don't forget to change them back!make sure you're distributor is set with the rotor pointing to #1 cylinder at tdc on the "compression stroke!"
(caught the other post),line the #1plug wire tower up with the rotor to get you in the ballpark,have some starting fluid handy but dont use very much if you need it at all,double check your plug wires for correct firing order,make sure the hei(if you're using one)is plugged in,have oil & filter for an oil change after break in/warm up,you'll need to re adjust the valves after it's fully warmed up,have extra coolant/water premixed(3 gallons would be a good idea)air pockets in the cooling system can cause boilovers,a coolant vaccum pump is really handy,have your timing light hooked up so you can get a close reading,if you use 2500 rpm for break in and your distributor is set up for mechanical all in by 3000rpm you can get a close reading with only a slight rev.i reccomend varying engine speed a bit anyway during the entire break in period.
above all stay calm!(easier said than done when it's your motor!)don't panic if it stalls,just go again.
wish i could be there!
best of luck!
86 camaro,383,topline vortecs,scat crank,wiseco forged 9.5:1,6"scat rods,comp xs282s,performer rpm,750 proform vac sec,msd in cap, hooker coated 1 5/8"headers,3"flowmaster,700r4,2800 stall,3.42 10 bolt posi,hotchkiss lca's,aje tube k member & a-arms