LT1 to lt4 conversion, perhaps for a dsm??? Options

[racerns]

Look, I pop back in to see what is going on back in DSM land and you guys are talking about LT-1s. My heart just swells with pride

The LT-4 kit alone is not going to get you to 400 rwhp, I think your expected numbers are a little high. The LT-4 kit with the GM Hot cam is usually good for 340 - 365 rwhp depending on other mods and how good your tune is. You need a bigger cam and maybe a little head work to get a stock bottom end LT-1 into the 400 rwhp range. There is a guy out east here named Joe Overton who has had good success specing out cams that put stock bottom end LT1 into the 400 rwhp range. To get to the 450 -500 rwhp NA you usually need to go to a solid roller set up, big head, and a stroker.

My 396 LT-4 has home ported LT-4 heads, GM 847 cam, and long tube headers and puts down about 435 rwhp and 431 rwt.

PS How did I get the name that other car that we shall not name Killer