Do the adaptors that enable an early 2 piece crank to fit into a later 1 piece block work?
I'd like to put together a roller 327 engine with a later 4 bolt block if possible.

Why not just use a 1 piece crankshaft? The 1 piece is better

I don't think you are going to find a stock 3" stroke one-piece-seal crank, but if you are willing to spend a little more you should be able to get one aftermarket.

While you are at it, I think you might find some gains with 2.000" rod journals, instead of the "large" 2.100" rods. Less speed at the bearing is supposed to be good.

3.25" stroked crank to make a 327 motor. (3.00" stroked crank for a 301/302!!)...

I figure the seal adapters are fine b/c GM sell's them. Or at least I think they have a GM PN on them, but they may just be aftermarket?

And you can get both medium journal and main, and small journal and main, 3.25" cranks too from the aftermarket. The small journal cranks are for the pre-'68 327 motors here and '68/'69 327's are medium journal..

And don't forget about a spacer bearing kit here too!! I forget if you can still get the small to medium set or not, but I think that you can still get the medium to 400 motor kit

pdq67

I have a medium journal 68 and up 327 crank.
I was pondering on the idea of a 88 4 bolt 350 block with a zz4 roller cam with vortec heads. It sounds like a killer street setup to me, being that the cam is decent for a 350, so it should be a little wild for a 327. Can I use the scoggin dickey z28 springs with this cam or should I go with something better.
I'll probably never take it past 5500 RPM. Do you guys know if the early 93-94 LT1 cams have an eccentric for a fuel pump? I can get one cheap.