new "truck" with questions

[68c10owner]

i just bought what is suppost to be a 70 swb truck. i was just going to buy the frame but i ended up buying all the guy had. here is what i got,

swb frame with complete front suspension although the x-member is off the truck. i did`nt want the rear,6 lug and locked up.

a A/C cab that is totally stripped,no glass,dash parts, A/C parts, nothing but it`s in better shape than my 68 cab and the doors are in very good shape.

and finally, a short fleet bed w/ metal floor that needs both rear sections of the quarters replaced due to some " custom body work" applied with bondo. they tried to smooth the taillights and rear markers. other than that it`s ok.

i got all of this for $200 bucks. now for my question. the guy doesn`t have a title for the truck and he claims it`s off the system. how can i get a title for this in california?

i was just going to swap cabs with my 68 but i started thinking, i could just build the 70 up and drive my 68 till it`s done and then sell my 68. if i can`t title the 70 cab then i`ll have to swap vin tags but it would be nice to have another truck. i`m sorry this is so long and i would appreciate any help anyone can give me on this.

thanks