PLT OF A PVT RECIPROCATING TWIN OVERSHOT INTERMEDIATE ALT DURING DEP CLB.

Narrative

THE ACFT HAD BEEN THROUGH AN EXTENDED ANNUAL; THE GEAR AND STATIC SYS REBUILT; AND FUEL FLOW PROBS. I WAS ELECTED TO TEST FLT THE ACFT. IT WAS VMC DAY; BUT I WAS SUPPOSED TO FLY THE ACFT ALONE. I DECIDED TO FILE IFR FLT. I KNEW MOST OF MY ATTN WOULD BE INSIDE THE ACFT AND BEING IN RADAR CONTACT WOULD HELP IN SEPARATION FROM OTHER ACFT. MY CLRNC WAS; RWY HDG CLB TO 3000 FT EXPECT HIGHER IN 10 MINS. RADAR CONTACT WAS MADE WITH DEP. I ADVISED HIM RWY HDG 3000 FT APPROX 5 MINS LEVEL AT 3000 FT. I ADVISED HIM RWY HDG; LOOKING FOR HIGHER. HE SAID HE WAS WAITING FOR ME TO GET HIGHER BEFORE TURNING ON COURSE; TURN R 30 DEGS MAINTAIN 4000 FT. I SET AUTOPLT FOR HDG AND ALT. WHILE GETTING ALL THE INFO AND WRITING IT DOWN FOR THE MAINT PEOPLE; I NOTICE I WAS GOING THROUGH 4800 FT. I PUSHED THE NOSE OVER TO GET BACK DOWN TO 4000 FT. AT THAT TIME THE CTLR SAID I COULD STAY AT 5000 FT; THERE WAS NO CONFLICT WITH OTHER ACFT OR EVASIVE ACTION TAKEN. I LEARNED ON THIS FLT THAT YOU NEED 2 PEOPLE -- 1 AS A CREW MEMBER TO WRITE DOWN ALL SQUAWKS; AND 1 TO FLY THE ACFT.