Which would actually suit my needs

[renehawk]

I'm in the process of assembling a 78 x 100/2400cc engine. The heads, equipped with 44 x 38 valves and dual springs, were crafted by Bothers Machine. It also features a 186/86b cam with a 104 lc and achieves a static compression ratio of 10.2:1, complemented by 5.325” H beam rods. During the bottom end assembly, I noticed the #4 rod interferes with the cam, even though it's a smaller base circle cam designed for up to a 78 stroke. Thankfully, my habit of triple-checking measurements has paid off. I'm contemplating whether to adjust the cam timing back by 4-6 degrees or to modify the ends of the rod for clearance. I understand that retarding the cam timing could shift the power band up by a few hundred RPM, which would actually suit my needs since the engine is meant to replace a Porsche 616 engine that performed best between 3000-6000 RPM

['77 Westy]

I’d modify or replace the rods. I have an 80x96 2316cc engine, 5.325 H-beam rods with 5/16” bolts and there is no interference with a standard size base circle cam.

[wreck]

When you are checking the clearance ,is the small end of the rod in the centre of the bore ? Ideally fitted to a piston in a cylinder .