FOX for my sp i used a 69 nova r/e 10 bolt it is 1/2in narrower than stock just went to local spring shop and got a pair of saddle mounts and took it to the local drive line shop here and they did the swap for 100.oo bucks this way i know the pinion angle was right and welding the saddles were on right also itonly took them about 1 .5 hours and i left in it so this may be a thought ..a 68/75 or so nova or camero /firebird wil be a good swap .i have seen the p/u r/e swap done and they are to wide to me it puts your tire way out almost rubbing the fender on the ones i have seen so remeasure and then measure agine .i also swapped sides with mt lower shock mounts and moved them to the inside of the frame this will give you about 2 in more tire room i just took a peice of 3in angle ad boxed the frame on the inside right where the upper brackets were and dilled the plate and bolted the upper mounts on and there you have moved your shocks

47 Chevy COE..52 TO 30