Is there a less expensive to

[hugger6933]

mount a big-block in the 68 chassis? The factory mounts for those years are hard to find and pretty pricey. I am not concerned with being all factory looking. I thought that I read later mounts could work but I am not sure if that is correct. I think my truck was a factory big- block, It has the high hump. Did all 3/4 tons have that? Being the this is a GMC I have found no trace of a SPID. My truck has been locally owened it's whole life and when I was younger I am thinking it was a 396 truck but it has a center boltv/c 350 in it now. I am planning a frame change to a swb 5lug suspension and I thiught that would be the perfect time to put in that 454 I have sitting and waiting to be called into duty. If someone could post some pics of the big vs small mounts I might could tell what I have if not maybe someone could answer about the later mounts working. Thaks for the help. Jim