[Stan Weiss]

Originally Posted by A.W.Dille

I'm in the process of replacing the timing chain assembly in my 71 GTO. Right now I'm running a Lunati BMII cam, .490 lift with 290 ° (advertised) duration. I've been running this cam for over 20 years.
The engine is a stock bottom end 400, with 670 heads. The heads have Ferrea stainless valves, 1.75 installed height with Isky springs. When new the springs had 130 lbs closed and 320 open. Unsorted and only .008 taken off just to true them up. The heads were done in 1998 by a former NASCAR engine builder.
I'm also running 1.52 ratio Comp. Magnum roller tip rockers with poly locks.
I'm thinking about going to a 744 cam. With the 4 speed I won't have to worry about a converter.
I already have an Ultradyne 280-288 that I was planning on using in a future build.
All opinions appreciated. Thanks.

Do you have a cam card or lobe numbers?

Looking at Ultradyne's Master lobe list.

H14 280 223 132 0.3088
H5 288 231 143 0.3222

H31 280 232 143 0.3334
H33 288 240 151 0.3334

Stan