I'm wanting to build a s/c 4K ,I'm thinking 4K efi ( if i source one),or suck thru su or weber & of what size?,I have extractors, elec dizzy, tighe #113 cam (in the post ),performance springs CB4 valve springs (in the post also),should i go double spring and get the CB4A springs as well. would a toyota sc12 supercharger be the best suited , Ideas to mod or mate together the crank pulley to suit, intercooling with efi but not suck thru.i will be building the 4K to suit ,piston,head gasket & bearing recommendations please.......i want to put together the s/c set up & fit it & the cam to my 3K whilst I'm building the 4K block. would there be any value in fitting the cleaned up & rebuilt 4K head to the 3K to run lower compession on that . can we get oversize valves for the K series or do i need to cut & shut another type...Ive found a lot of info here and other forums. would like input to get a general opinion from those who have gone down this path , or hopefully know more than I. CHEERS :)