have not used jc's i used chassis engineering in my 49 motor mounts bolt in they also have a trans crossmember that bolts to the original location. about $160.00 for both. as far as rear springs i just installed their bolt in rear end kit 2 1/2 in springs with teflon sliders upper and lower shock mounts, shocks, front and rear spring mounts got a 4-5 inch drop all their stuff comes with very good simple instructions ialso used their pacer front end kit which i think is the same one jim carter sells. recomend them highly . my two cents anyway..........

1949 Chevrolet 3100

"When this thing hits 88 miles an hour, you're going to see some serious sh%t." -Doc Brown