low numbers for 347???

[vpap1]

ok here is the particulars,

347 10 to 1 short block from coast high peformance
track heat top end kit with stage 2 cam
80 mm maf
75 mm tb trickflow
bbk shorty headers
no cat h pipe
4o series flowmasters
true trac posi, 31 spine mosers
rear upper and lower control arms
3.73 gears
upgraded coil and distrib chip
dyno tune made 282 at the wheels

reccomended a griffin radiator cuz it was pinging at the top of the gear, motor is fresh ie less than 5 miles on it, new clutch, fly,

tranny has trouble shifting and is being replaced, is that enough to cause the low numbers????

its a reputable shop as well, Dez Racing

any ideas? or weak points in the combo?

V