Looking to hear what you guys think about this combo. It would be going in my 75 with factory stall coverter and 308 rear gears. Link http://superchevy.com/tech/0312sc_dm15/ danger mouse test 15 is the one i am looking at.

THE BEST BUILD
Through all this we've learned that there are certain ways to build an engine to give you the best power-per-dollar. And the best thing is that all the combinations we've tried so far would be easy for you to duplicate yourself. Perhaps the best combination for the money we've tested has to be the Vortec iron heads and COMP Cams XE262 camshaft with an Edelbrock Performer RPM Air Gap intake we ran in DM Part 6 (February 2003). This engine made tons of low-end torque and still managed over 415 hp--and all from a very affordable and streetable package that even makes enough vacuum for power brakes.

T15--DM Part 6: GM Vortec iron heads SDPC PN SD8060A (64cc chambers, 170cc intake runner volume, 1.94/1.50 valves) with Comp Cams 1.6:1 Magnum roller tip rockers PN 1418-16, Edelbrock Performer RPM Air Gap Vortec intake manifold PN 7516 COMP Cams XE262H cam (262/270 advance duration, 218/224 duration at .050, .462/.469 valve lift, 110 lobe separation) straight up.

T15 T15
RPM TQ HP
2600 379 188
2800 384 204
3000 404 231
3200 427 260
3400 433 280
3600 435 298
3800 437 316
4000 432 329
4200 433 347
4400 434 364
4600 439 385
4800 433 396
5000 423 402
5200 411 407
5400 401 413
5600 389 415
5800 365 403

Max 440 416
Avg 417 333

 

I don't think it would cost anymore to build a 383 than the 355 & the extra ci would probably make the bigger heads & cam work.

 

it uses vortec heads and a 262 cam. I already have the bottom end i am basing this for the top end. If you keep up with my post the guy that built my motor was a complete dumbass and used the 882 smog heads with a Edelbrock RPM Performer Cam which blows.

 

In that case I certainly don't see anything wrong with those numbers. It should make a nice street engine. Your gears are a little light, but workable, maybe a higher stall converter 2000-2400 for the extra hp.

 

yea i have that engine in my 92 bird only with out the air gap( i have performer rpm) and just stamped steel rockers. i can honestly say that with a sucky tune and something wrong with the engine and little traction it ran 14.5@99mph. with the new ignition i see 101-100 mph at most. im a little disappionted with it, but owell

 

well i am wanting a street motor not a race motor. How is the car on the street

 

really nice, if it gets tuned well great! with the 6speed and running rich im afraid, i still managed 25mpg on the freeway.