the p/s box on the 69 and 78 are exactly the same... use whichever box you want..... also you will need to redrill two new holes in the frame for the crossmember.... easy
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68 4x4 short fleetside 327 CH465 edelbrock intake and carb MSD distributor its the "SHAGROLET"
56 big window short stepside 235 dual 1 brls
64ImpalaSS 327
70 C10 LWB fleetside custom/10 350/TH350
IM me on aol SN= SHAGROLET