Don't know if this post is a little late but I have a L71 427 in my 57. I have the BBC motor mount from the CCI. It moves the motor foward 2 1/2 inches and saves any damage to the fire wall. I have a deluxe heater in my 57 and run and 700R trans and there is plenty of room for the fill tube behind the block. I also run disk brakes and the 7" vacume for the master just clears the stock chrome valve covers on driver side. I have the Headers by Headman that the club sold. It clears the stock steering box and the 605 box. The stock oil pan works fine. I did have a droped drag link, that has since been removed in lu of a rack and pinion. You have to add a rear trans mount. which gives you 3 points of engine mount, You will never tear a motor mount!! The kit comes with front and rear engine mounts. The rear mount uses the bolts on the Transmission and the stock rear motor mounts on the chassie. With the motor moved up you have to run a radiator in the 6 cyl position in fornt of the radiator bar. If you want to run a rack and pinion there is a few more thing you have to do. I have the CCI rack on mine. Ive had my BBC in since 95.