Dont know if it is actually nessecary,but if you do box it be careful how you do the welding.Dont weld to long in one spot,move around,do a spot here thn jump over to another place and weld a little bit.It is possible to warp your frame by getting it too hot,in a small area.Just my opinion,hope this helps you out.I would think that just boxing the front portion of your frame would be good enough to add a small block V/8 into it.When I put the M2 frontend in my 55 I boxed probably about the front 25%of the frame,it also has a 350 SB in it,everything has worked out just fine.
Last edited by dale937; 10/21/2010 1:38 PM.
