What's holding it back

It takes about 340 hp to move a car that weighs 3600 to trap speeds of 106 mph
Use the dyno for what it is, a tuning aid

I have seen 9.60 cars only make 360 hp on a dyno..sloppy converters and silly stuff just wouldn't let the rwhp number come out right on dyno pulls.

The timing is probably about where it should be for the more effecent alm head if it where a stock one 38-40 would be normal. I know someone with a fairly serious drag car and it only has 30* on some severe ported Indy street heads.

I have been shown a much smaller converter for a m11. I can't remember the trans it came from but I know they where installed in older postal jeeps. It was a ??4 trans mission and I know the cores are very hard to find but a better canadate for a stall converter. Mabey someone else on here knows about them.

I wonder what a 290/M40 converter would stall at

These days at our Nostalgia and street meets, they like to see full interiors in the street cars, but I am with you on the weight savings. I'm sure I can knock a good 100 lbs of the last race weight, maybe a little more.