79 K10 292 problem

[kolo]

Trying to put a straight 6 292 into a 79 K10 4x4. Truck was an original 350 4 barrel. This is my sons and he bought it with no motor. We have a few 292's so that's the reason. Mating up the motor to the 4 Spd manual we find the oil pan doesn't have proper clearance to the cross member/ engine bracket. Know all about the difference on the frame towers, but is there a different cross members used on the 292. I also know they were not offered in the 1/2 tons but I didn't think it would be a problem. If anybody knows the solution please let me know. Otherwise I will be cutting and modding the cross member. Thanks.