I have a factory 305 car with a 355 transplanted with the proper stuff but I'm not sure about the ECM and the chip. I've been toldd both share the same ECM but a diff chip between the 305 & 350 cars. Currently I have the ECM with a hypertech prom for the 305 with for cars with a cooler thermostat in it. Everything works fine and runs great and no codes and sets codes properly. What I'm asking is if there is a diff prom I should be running along with the ECM. I was thinking of getting new chip burned from FAST or someone else reputable but after I get my nitrous setup. I'm thinking though right now, that this ECM and chip setup is holding the car back and creating a wall for its true potential. At the track with street tires I was able to get a best of 14.0 @ 105mph and still getting sideways when applying full throttle at mid track. I am still a very amateur drag racer and the track surface where we race is not the best facility at all, I notice this with all cars running there. Anyway with that time and MPH I will list the mods to try and give an idea of the whole situation.

Engine:
355 c.i. 4 bolt main TPI
ported & polished 62cc heads
stainless steel valves
compress ratio of 10:6 to 1
ported oil passages
2 valve relief hyperutectic pistons
crower cam with matched 6500rpm valve springs and comp cams hardened 0.80 pushrods

Cam specs:
Advertised Int. duration 278/497 lift
Exh. duration 286/518 lift

Roller rockers
Roller lifters
True roller timing chain
Ported Intake Runners
Ported plenum
52mm Edelbrock Throttle body
Hypertech air foil
hypertech 160 thermostat
hypertech stage 2 thermo chip
High capacity alum Radiator
Jacobs Coil
taylor 8mm wires
March crank & alt underdrive pulleys
Fuel press reg and gauge

Transmission:
Corvette 700R4
B&M cooler
B&M Stage 2 shift kit
B&M 2200 stall

Induction:
Ported Factory intake base
MAS screens removed
Modified air box with K&N

Exhaust:
Edelbrock TES headers & Y pipe
Flomaster muffler
Hi Flo cat

Any thoughts if my ECM or chip could be improved/changed whatever and if I have an oddball combo in the car already, Please let me know, I want to go faster but also need advice.

THANKS to all in advance.

 

call up madwolf or pcmforless on this forum,they can help>Jake