1993 civic dx b16 swap

went to Japanstar yesterday, found out they’d do the whole swap for $2000, so thats a little out of my pricerange. Said I could get a B18 or B20 for $1200-$1300 with everything, which should I go with? I’d assume more displacement would produce more power, but they said the B20’s cheaper than the B18…are both DOHC?

also you said in another post you had everything for a man. tranny swap for me, and yet another post you said you had everything for a rear-disc conversion from an integra, do you still have that?