Finally pulled the engine out and its a goner

[Gelbster]

A quick budget will simplify the choices. Just ask those who recommend a particular solution what it cost in total .
A good used engine is a gamble but usually the cheapest option. You can sell your old one ?
Doing a high quality rebuild cost me at least $15k in parts,special tools and machine work. Before you do a diy rebuild. add the cost of a Raby M96 rebuilding class.
The M96 is not an easy,cheap,simple rebuild. Experience with a SBC is inadequate qualification !