I have a 1970 K5 that I am swaping out the 350/sm465/np205. The engines already gone. I have a TBI350/700r4/NP208 out of a 1988 K5 Blazer donor truck. I want to use the two forward mounting holes for the engine crossmember. I think the 700r4/208 are longer then the SM465/NP205 and can use the extra space. Has any one used the forward mounting holes for the engine crossmemeber? ( why are they there? 6 cyl application?) Are there any clearance problems for the oil pan to engine crossmember? I will be using the trans crossmember out of the 88 K5 and making my own holes anyway. (I don't think the stock holes will line up any more) Any input or <font color="blue">measurements</font> would be greatly appreciated.