Looking into putting a 5 speed behind the l16 in a 1970 521 pickup. Don't want to the dogleg. From what I've read the next best would be a FS5W71-B (preferably mid ratio). Are there any reputable shops rebuilding and selling these transmissions? The truck currently has the 4 speed so I wouldn't have a core. I've read mixed reviews on 'California Datsun Inc' so I am skeptical... but otherwise Google isn't providing great results. I'm located in Dallas but willing to have something shipped, if there's even a market for this.