1988 Jeep comanche AKA the penny sniffer

[sam_hodnett]

a few points for you to consider

-An LS motoer, even the iron block motors weigh less than a 4.0
-They are shorter and only slightly wider than the 4.0 with the huge intake hanging off one side
-LS motors and 5.3's in general run very cool, 4.7L stroker motors are hard to keep cool
-You will have a hard time building a 4.7L to match the HP of a vortec 5.3, they may rate them lower but they usually dyno closer to 350HP

LS swaps are getting easier and easier, if you don't want to tons of power swap in a 4.8L

This.