This is really encouraging reading this. As I read this I am putting the finishing touches on my forged 383 w/ported ls2 heads from patriot and an ls6 intake. For a cam I have an ms4 and pacesetter headers with sweet thunder true duals from tsp and in about a month it's getting installed in my 02 ss slp camaro. I'm glad I found this thread because for a minute I thought I might have built the wrong motor with everyone building these big inch high dollar 402 and 416 that I can't afford. Great thread!

 

Stock 10bolt?? If so,minus about 25hp for a 12bolt and gears.
98WORKHOURSE-You don't need a 402 to make power. My boy has a 383ci that makes just over 500hp with a steel drive shaft,un toucked fast 90 intake,12bolt w/4.11's on a mustang dyno. He does have higher compression to get the power up 11.7: and a good set of heads in trickflows. He has the best of everything you can buy and still has more in it if he choose to get a newer fast and have it ported. Even my ls1 made 463hp 414tq on a stang dyno,steel shaft,un ported fast 90,12bolt w/4.11's and that combo had more in it too if i got greedy.

 

my new 383 setup will hopefully be ready for the dyno friday, will post numbers. TEA tfs 225cc heads, ported fast 102, 24x,25x custom cam, full boltons, t56 magnum s60 11.8 compression hoping to break 500

 

We will be waiting for numbers and I'm almost sure that you will break 500 with that great combo and a good tune.