I have a complete 52 8cm flathead with 32000 original miles, insides are great, compression numbers are 112,111,112,113,110,112,113,111 standard bore, 4" stroke, I pulled the heads to check cylinder walls, they were excellent, Can send pics of cylinders if you want, Comes with original 4 bolt Intake. Motor was pulled in 58, sat inside since then. No visible cracks or wear. Water pumps feel tight. Also you can change heads and bump the compression on mercs. Also included is a complete t5 setup for flathead, includes, flywheel with pilot, new clutch, new pressure plate, new throw out, block plate, adapter plate, starter, mounts, COMPLETLY rebuilt s10 t5, with electronic speedo with VDO speedometer, all clutch linkage, and extended shifter. Call for more info. 513-807-4488