Fact or Fiction--Trailer tie downs

My track car 64' Valiant backhalf has a straight front axle and I go over it with straps to tie down the front, I have two chains with some slack on each end of the Dana that stay on car always (joined with grade 8 bolts, nuts, lock washers). I attach my rear strap hooks to these chains, it makes it a lot easier and your straps don't get as dirty from having to go over the axle. As to the shock ? Never heard of such a thing and like others said "don'tworryaboutit". Have fun and take it slow till ya get some *** time.