just do the b20 vtec till your wallet gets right spray about a 55-75 shot, 1 step colder plugs while you take your time building the other for a spare. i drove a b20b4 vtec all motor then sprayed while i was building up my parts and wallet for my ls vtec (thicker better sleeve design) then aquired a turbo kit and precision turbo sold nos kit and boosted b20 vtec to 8 psi and was happy for 4 years @ 258whp @ 8psi. now i pulled out the still running b20 to keep as a spare and am running a fully built ls vtec i took my time with while playing with the b20 vtec. then you can keep the gsr for spare or fix and sell to put into some forged rods and pistons and shoot for 400+ on a boosted ls vtec while your sportin the b20 at the time plus you can do the vtec conversion while motor is in car.