Not to highjack this, but If others strike out..... I think the 318 and 904 out of my '70 Challenger is still around as I've cloned her up to a 440 6 pack, so highly unlikely I will ever put her back to original. Let me know, as I may have to do some searching. As to shipping, I think the weight difference (motor/tranny vs. roof skin) will be significantly more..... This would be coming from Vermont....
VT Mopar