Ok...I made some guestimations on your engine. Stock b/s 283, 9.75-1 compression, stock 305 heads with 1.84/1.60 valves, a aggressive 250/260 (seat timing) solid with .459/.457 net lift (assuming .020/.022 lash and 1.6 rockers), performer intake, 600 carb, 1 5/8" headers, and a 1000cfm exhaust. Like you said, it does make a very flat torque curve...from 2000-4500, then it falls flat on its face. Torque peaks at 3K and drops from there. Hp peaks at 5K and also falls off a cliff. It also predicts that it will have 230+ psi cranking compression (race gas territory with iron heads), and I usually find that it predicts about 10psi low. It also predicts that the engine will be quite inefficient. Power peaked at [email protected]
, torque peaked at 292 [email protected]
Then, I "swapped" cams to a 097 with 1.6's. It did make less torque under 3500, but then took off and blew the 1st cam away. It predicted 40 more hp at peak, and peaked at 5500 where it was making about 53 more hp than the 1st cam. Torque peaked at [email protected]
, hp was [email protected]
Cranking compression was 181psi...doable on pump gas if you are a sharp tuner.
Next, I used a standard -929 gm hydraulic with 1.6's. This was interesting. It made only 10#'s less torque at 2000, even at 2500, and kept increasing to a peak of [email protected]
rpms...making more torque than the 1st solid at everything above 3K. Hp peaked at [email protected]
, with a gradual dropoff to 5500, then it too nosed over. This cam beat the 1st solid handily, but cranking compression is still too high at 204psi.
Next, I used a performer type hydraulic with 1.6's. Compared to the 250/260 solid, this cam was down about 30#'s at 2000, even at 3200, and pulled away from there on up. Same with the hp, with a peak of [email protected]
Still too high at 197psi.
Comp 270s w/1.6's...blew the 250/260 away at anything over 3200, and gained 50+hp at the peak. Still too high on the cranking compression.
I also ran the L69 cam with 1.6's. There was a slight torque loss at 2000 (about 15#'s), about equal at 3K, and pulled away from there, gaining about 35hp at the peak. 190psi.
Take these with a grain of salt, but the program seems to agree with me...cranking compression is going to be insane with the small cam and very tight lsa. A -929 with 1.6's seems to be about the best compromise here, but the compression is still a bit too high.