Pushrod Lifter Bore Spacing

[murty]

Hi,

I'm trying the model up the valve-train geometry in CAD for a 1275 A-series, but can't find any info on what the lifter bore spacing is for a 1275 block (I assume A-series and A+ are the same?). Would anyone here have any information on this as it would be greatly appreciated?

Also, I've read in Vizard's yellow book that the pushrod holes are at a slight angle (2.5 degrees from the vertical), but doesn't say which axis (towards the bores, or towards the outside of the block, or away from each other, or ...). I guess, what is the relationship between the pushrod holes at the top surface of the block versus the lifer bores?

Thanks,
Paul