MGA engine .i.d #'s

[70 GT]

Howdy all,
I picked up an engine,trans combo from a guy who says it's from a MGA. I don't know for sure what I've got here,have numbers from from block,cyl head and trans.I do know that the trans is an o.d. unit.I've owned at least one "B" for 25 + yrs.Maybe some of the pros knows what I've got.
Engine #'s
1B 2363
J665
Wes Lake Patent
no.59344
Cyl. Head #'s
16-7-66
1B 2291
1667
Trans #'s
Mowog AEO 3174
Type BN 2
5012
O.D. #'s
Laycock De Normanville
Serial no. 28/1447/001458
Patent no.GB 456007 Coventry England

Any help would would be great.Thanks for your time.