The 510 Realm

Hi
Posting for my first time but long time 510 fanatic. Hoping someone can give some idea of the current value
Of my L18. It was sourced from Japan in the mid seventies and has the A87 head. Originally set up by Bill's Datsun here in Portland it's a great engine and I have a friend interested in a trade but I have no idea what the current value might be. The former owner said it was a SSS engine but I do not know how to varify this claim any help appreciated.
Thanks so much.

Typically you'd have a single-point distributor, dome-top SU carbs, and a peanut head. To verify the head you'd have to take it off, A87 came in a couple different configurations.

Thanks for the info. With the exception of the internal head ID the motor does have the single point distributor and did have the dome top SU's but now running a tweaked DGV that Bill modified.