When you say 49 degree, is this an altered 48 degree block?
48 degree block is a much better starting point for a performance build. No lifter clearance problems or port intrusion from pushrod pinch. Cam cores can be hard to find depending on journal size. Intake lifter location is spread wider for pushrod angle correction over the 59 degree blocks.
Some of these low deck r3 48 degree blocks are dry sump oiling only, so I hope you are prepared for that. Also be prepared to part with some cash with rocker assys for this deal.
Also if i recall correctly, the waterpump/ timing cover is different on the low deck height blocks.