66 Dart engine swap

The factory 273 port exhaust manifolds will choke that 360 down hard. I used a 73-76 A-body 360 manifold set in mine with a u-joint steering column coupler to clear. win-win - clearance and no more hot garbage pot-coupler. Motor mounts - I went with schumacher conversion mounts and poly-loc isolators - truck isolators (72-93) work fine too. You will need to dimple the oil pan on the 360 to clear the drag link at full left lock. If you plan on keeping the trans, B&M offers a flexplate that will balance the 360 correctly (LA or magnum) without having to modify what you have. depending on your oil pan of choice it may not be a bad thing to notch the k-member to gain clearance. theres some awesome write ups on that floating around here.