1977-1990 B-Body crossmember | RCB3-4L80

1978 Buick lesabre

I converted this Buick to a SBC and 4l80e transmission. This crossmember fit perfectly

Great fit

5 stars as it's built really well I bought it for a 1984 Cadillac Fleetwood coupe b body frames soposta be the same as a Caprice ECT frame and chassis wise even though I found out these isn't just going to bolt right in long angle iron on the driver side is to long to slide on top of the frame and make it worse doesn't appear bolts holes are differently not lining up and #1 worst part is it hits the factory drive shaft hoop and factory spot welded mounts for the hoop differently not allowing it to even come close sliding in luckily I haven't got power trains in yet but eventually I'll be seeing if it will work after modification if not all have really good tarp weight also the dual exhaust spots hit the floor I'm planning to run a single turbo ATM so kinda a haha on my part diffently not bolt om for 80-93 Cadillac brougham