hi mate I am using zx6r carbs on a couple of my cars a tiger kit car running 2.0l zetec and megajolt pushing out 180bhp and a mk2 fiesta with rs1800 zetec again running zx6r carbs and megajolt pushing out about 165 bhp and still climbing (need some arp bottom end bolts should be food for 175 then . the throttle bodies are same size choke's but unsure if injectors will be up to the job and you still have to get the thing running megasquirt or similar . you mentioned price being an issue injection costs more to get going . imho stick with the carbs and go for a megajolt . if you dont fancy the wiring stuff company called chester sportscars do a pre built system just plug and play simple and good . have a look at their web site www.chestersportscars.co.uk