Money purchase QNECs?

[Guest qualified plan]

If an employer has a 401(k) plan and a money purchase plan, can the money purchase pension contributions qualify as QNECs to help the 401(k) plan pass ADP testing (assume Section 401(a)(4) would not be an issue in testing the aggregated and remaining money purchase contributions)?

My question really is whether this would be precluded by the requirement under Treas. Reg. Section 1.401(k)-1(b)(5)(vi) that the plans could be aggregated for coverage testing. Is this a problem for a money purchase plan and a 401(k) plan?

Thanks.