size wise a ford 32v cobra lump is a bit bigger ,than the ls1 ,
pound for pound the ls series give a better bang for your buck ,
rich , drop me a pm , ive looked into this alot as contemplated it for the mk 3 ( may still do it after a year with the yb )
theres sump kits from the usa that save alot of the cutting and hacking of the 2wd crossmember ,
but tim garringtons fitted a ford mod 32v lump in his escos in the resto section , and the cheeseman escos's both run ls motors ,
drop me a pm if you want any more info sausage !!!
beef