these are all being sold as cores.

complete...

289-2 avalible
302-3
351W-5
351C-4
390-2
429,460-3

short blocks....

351w-1
351C-3
390-5
429,460-5


bare blocks...

390-3
429,460-6
there are plenty of head cores,and rebuilt heads in plastic.
sorry no 427-428 avalible at this time.
please e-mail me for your needs or a price.thanks
eric