IMO for NA application nothing wrong with the smaller headbolts, my concern is the fact the clearance in the holes through the head, redripped/tapped block seems suitable.

Any of the ARC/AVY blocks alloy??? Or are they all or what? lol

Drilled roller is fine IMO, why wouldnt it be?

x2, I'm following the same route, also because I'm not convinced a drilled tensioner is a good idea.

With with Nick on this one too (Harris), my understanding was you just put the entire bottom end from the AVY into it:

Crank, pistons, rods.

New rings if you're going to lightly hone the AFH walls; new shells for the AVY crank, since that's the crank going in. Although I'm sure they're the same - VW dropped loads so one bearing fits all the small block cranks.

The only advantage the AVY block has is oil-squirters.

The cap bolts aren't stretch, so you can keep them.

Remember the crank pulley is different; according to Mikey.

I'm gonna do this in the spring/summer when it gets a bit warmer. I've got a crank and pistons sitting there..

cheers Adam glad someone else is thinking along the same line as me, i have a complete early afh and a late afh and a complete avy bottom end with crank pully, so I'm sure i will find one that fits.

Iv'e read on here both the late afh and avy is ok to use, and the one on my avy block looks the same width as the afh not measured them up yet as they are both in different places but will check this out.