from what i have red a lot of the v8, arnt any hevyer than the l series
How ever i am not a fan of puting v8,s in zeds i am also not a fan of interbreeding , they should stay nissan but thats just my opinion
check out this 916 rwhp tb48 on the dyno
http://au.youtube.com/watch?v=nPMU_sDnXw0&feature=related
patrol burn out
http://au.youtube.com/watch?v=gY7nhMIgY5U&feature=related