Why even bother with swaping heads to a DOHC? You might be lucky if you get like what, 10-15hp?
You could spend the time and money on the SOHC and make it even faster then the DOHC cars!
I have a 96 Neon SOHC 2dr 5spd.
I bought the car off of ebay w/65k miles on it for $2000.
I put about $2000 into it and it runs 15.0's @ 94mph!
I have......
Mopar pcm w/7200rpm redline
Stock, block, crank, pistons, valves, and rockers.
Fully ported & polished head with 3 angel valve job
2001 Magnum R/T cam and valve springs
INDY intake manifold
Mpx 55mm TB
Home made CAI
Mpx under drive pulley
Pace Setter Header
2 1/2 high flow cat
Pace Setter 2 1/2" cat-back
Booger bushings for the cut down shifter
This is just my work car that I drive everyday, it now has 80k miles on it, looks stock (except the exhaust) and runs down stock GTP's!
I love it!