Well after much thought I have decided to go with the 427. Can you guys give me some suggestions about components. What I have is a 73 454 2 bolt block,6223 steel 427 crank, 049 gm heads, scat I-beam rods with arp bolts. Now I need your help on the rest...pistons, rings, cam, ignition ect. This is going to be a strictly street car. It has a m20 with a 8.5 rearend(not redone yet so gears can be anything). I would like something with a good lowend . This is the first car I've done so I'm pretty much a newbie. Also the car is a 68 camaro. Thanks for any thoughts you have.

what's the intended usage of the car? street/strip, all street, all strip?

what kind of shape are those 049 heads in?

Its all street and the heads are in excellent shape. I just took them in and had them cleaned and checked out. They are bare rigth now so we will be outfiting them with a mild port job and new hardware.

Well after much thought I have decided to go with the 427. Can you guys give me some suggestions about components. What I have is a 73 454 2 bolt block,6223 steel 427 crank, 049 gm heads, scat I-beam rods with arp bolts. Now I need your help on the rest...pistons, rings, cam, ignition ect. This is going to be a strictly street car. It has a m20 with a 8.5 rearend(not redone yet so gears can be anything). I would like something with a good lowend . This is the first car I've done so I'm pretty much a newbie. Also the car is a 68 camaro. Thanks for any thoughts you have.

Pocket port the 049's, Save some dough and leave them stock valve size. Add some decent springs and retainers and top them off with some roller rockers.
3/8 push rods, moly rings, clevite bearings, Fel-pro gaskets, HV oil pump.
Run on the mid to top side (loose) on the crank clearances.
L2268F forged pistons, pit fit the pistons for the pins. (I assume the rods are press fit??)
280 Isky megacam advanced 4 degrees
Performer RPM
800 DP'r
Hooker 2255 2"X 3 1/3 headers into 3" exhaust.
Just a HEI with a hot coil and brain is fine but eliminate the vacuum advance and change to a very light advance weight spring(S). Run about 18 initial, 36 total.
Aluminum flywheel or light iron
4.10-4.56 gears

All equals completely streetable high RPM burn-outs through multible gears. Mash the throttle and it'll come unglued.

Darryl's Chevelle is awesome
My cookbook has a similar recipe
One step down for better manners and a cam in the 235* @.050" .540 to .550" lift on 111 LSA makes a good street cam. My 68 427 Vette pulls about 14" of vacuum, gets 15 mpg on the road with 3.36