hey im new to ratsun and i just got a 73' 620 and want to drop in a ka24de on it... i love the ka:p... i used to own a 240sx but fell in love with the 620 so i sold it and got the 620... i want to know if the ka drop right in or do i have to mod the mounts? as for the fuel pump wich one do i have to use? and also what other mods do i have to do to it to drop in the ka? can you guys help?