the ls4 crank is a little over 10 mm shorter than standard ls blocks iirc. the first thing to do is get rid of dod. next get the most displacement you can out of it. you can prolly get a 383 but again the cranks different to its a matter of making a crank as the another ls wont fit. headwork and a cam and youd be pushing way more power. not to mention the sound.im still considering a ls4 swap but itll prolly sit on a stand until its fully done. ive also been told youll need the cradle and suspension from a gxp too. im only lookin for about 300whp so a l67 build would be way easier and cheaper. and the whine is better than any ls4
