Does anyone sell the adaptor to convert my 1956 CJ 4X4 with the F-head 4 cylinder motor to electric power?
Hi, Frank - I really doubt you'll find a pre-made adaptor plate for that particular engine. On the other hand, it's not that hard to build one, and a lot of people build their own.
If you don't feel confident, or you don't have the tools for this, the folks who sell electric car motors and conversion parts should have no problem providing an adaptor plate for your conversion. You'll be tracing the outline on cardboard and sending it in, they'll be building an adaptor for you.
Or you can head to the nearest Electric Auto Association meeting and I have no doubt you'll leave the meeting with a solution if you talk to a few people there.