1) In the single reference noted it was probably a step.
1590 wheras Thomas Graves haith layd and sett downe his pace and paving before his dwelling howse bothe higher and further out then the same ought to be ... it is nowe agreed that he shall ... cause the same pace and paving to be made level and equall with ... his next neighbours, York.
2) The Christian festival of Easter.
1561 In pace money vijs xd, Richmond. It was a regional word, noted in the York Mystery Plays in 1440 and preserved in the Pace-egg plays, still acted out in Yorkshire and Lancashire.