I noticed it was agressive. That's why I was curious to see what you thought about it. It is listed as an EFI grind, but I was thinking it would be borderline.
I tried to use a ratio formula of my own to determine Advertised valve overlap of the Lunati 50156.
Used the Isky RR272/282 as baseline since advertised and .050" valve overlap is known, 53 degrees advertised & 5.5 degrees @.050.
I came up with 163 degrees valve overlap.
Can not be right.
230/240 @050" cams can have overlap all over the place.
Most Famous of all is the Factory 1969 - 1970 RAIV 400 Cam with 87 degrees overlap.
In F.A.S.T> Drag Racing this RAIV 400 Engine is pretty much King.
Engine has to be 100 % stock.
No aftermarket cams .
No aftermarket cylinder heads.
No porting.
Just long tube headers.
No slicks or drag radials allowed.
Must use exact same tires the car was built with.
Bias Ply tires.
Radial Tires came out in 1973 on the Trans Am.
430-475 Hp obtained from the Pontiac RAIV 400.
Guys are Ripping Low 11's & high 10's 1/4 mile.
So we are not that far off with your 400 Small Block Chevy.