IC2 a member here had the same issue with a SBF and firewalls . That convinced me to do my own and fit it to engine . Your only choice may be move engine forward some . I'm also going to run a SBF . You could work some metal and fit bottom together better at floor . I'm learning if it's going to work it's going to be modded .

There is alot of guys here with more experience in prefab stuff then me this is my first rod build also .