rb tunnel ram on a b motor

i bought the 440 tunnel ram, got the guy down to £130 sterling. it's only metal so i'll make it work. i may take a section out of the runners each side then drop the centre back down in the middle to narrow it for my 383. if that doesn't look doable i'll just remove a section lengthways from the base then adapt the top back on. we'll see, my time's free so.......
cheers, neil.