All small block engines are usually intercahangable ,you may need a engine mount ,it looks like that engine
has the mount molded in with the block!
You had just missed a nice AE 18 engine brand new for 50 bucks a couple weeks ago!...:D
I got some ofna engine mounts if you need them ,they I...
If the back plate is the type that has the starter shaft coming out ,then you don't need a pull start to start it!
I use a o-way on a socket to start mty OS 18 with out pull starter.