I've got a TON of white smoke pouring out the back. It's cool to blast pedestrians with, but it can't be good for the motor. Also, the oil pressure is low. Is this a head gasket? Or something else? Thanks for the help, Derf

Head gasket

white smoke is a bad sign....check your water level...I bet it's low.

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350 4 bolt main, Speed-O-Motive 383 stroker kit, re-sized rods ground for clearance,TRW Forged pistons,10.7:1 compression,HPC Coated RPM intake, Holley 750 cfm carb,World Products Sportsman II heads,2.02/1.60 valves, Comp Cam 1.6 roller rockers, Comp Xtreme 284 cam,240/246@.050 with .540 lift,Crane pushrods,ATI damper,Proform HEI and MSD6A box,HPC coated 1 5/8 headers, 2.5" exhaust with 40 series mufflers,TH350 with Hughes 3000 stall, Powertrax NoSlip Locker, 4.11 gears.

It is your head gasket most likely.

If not the head gasket it's a cracked block.
On ether, the engine would get hot anyways,park the car quick.