Dude i jist dropped a 440 in myb65 dart too. And also have tje 187 pan dude. And habe the same.problem. from.what one of buddies said is got to notch the lan dude on both side to be safe. Ima notch my 187 pan and weld some.baffels in it. Hell yeah buddie what intake u running? Im thinking of selling my holley street dominator to fund a tunnel ram.haha