Last March Brian @ IMM posted his Budget 400 Build Well, I purchased the shortblock and today we finally got it on the pump. The cam is still the little Thumper 227*I/ 241*E @ .050 .524"I/.508E" (1.6 rockers) 107 LSA. I had Brian massage my RPM heads and he supplied the PRW 1.6:1 stainless rockers and matching pushrods. I supplied a crank scraper and Milodon road race pan for the bottom and an Offy tunnel ram and a pair of AVS carbs for the top. A Jegs MP knockoff distributor for spark. The headers were Brian's TTI 1-7/8" dyno headers.
The carbs were seriously lean to start with, so I got to be an honorary IMM employee, pulling the tops and re-jetting the carbs. The third time was the charm, as Brian deemed the fuel curve acceptable. The best #s of the day
489 ft/lbs @4700- thanks ram tuning!
472 hp @ 5300
The air valves still needed some tweaking- they were opening too soon and causing a hesitation, my headers need a ding to clear one of the spark plugs so we couldn't hook them up , and we didn't spend any time with the timing.
Brian was perfectly willing to keep going, but My Dad and I had a 3+ hour drive home and I was satisfied with the results. Personally, I think it's pretty damn strong for a stock stroke mild cammed 400.
Thanks to Brian and Fred for your time, putting up with me and Dad and building me a great bullet.

Those are some great numbers for what you have. I bet once you find the right carbs (or tweak what you have) for off idle this package will have excellent street manners. Congrats! How about a recap on the specs, pistons,rods, rings compression, head flow, etc?

The Shortblock is pretty basic, 383 steel crank, stock rods with good bolts and KB hyper pistons. The Eddy heads were milled to 80 cc, final cr of 9.7:1. Timing total of 35 degrees. Can't find the flow sheet for the heads, but the intake maxed out about 300 cfm. The sheet is probably @ Dad's house and I've got to get there and unload the engine from his truck . I'll post more details later.

Head Flow # All @ 28" and radius plate.
In Ex
.100 79 60
.200 159 118
.300 229 155
.400 271 180
.500 289 199
.550 295 208
.600 299 212
.650 301 214
.700 300 215
Brian didn't flow them before porting and said most of the work was on the intake side.
Dyno #s
C HP C TQ
3.0 219 383
3.1 232 392
3.2 245 403
3.3 259 413
3.4 274 423
3.5 288 432
3.6 302 440
3.7 318 451
3.8 333 460
3.9 347 468
4.0 361 474
4.1 367 470
4.2 381 477
4.3 392 479
4.4 406 484
4.5 416 485
4.6 427 487
4.7 438 489
4.8 445 487
4.9 451 483
5.0 457 482
5.1 462 476
5.2 467 472
5.3 472 467
5.4 460 456