400/426 Stroker. Ever heard of one?

On a quick overview of the 340 to your offset low deck crank build, they’re kind of similar with big bore and short strokes. I’m sure the low deck will spin quick and high.

Considering the low $5K budget, home porting OEM cylinder heads seems like the best option. Also @ .474 lift, the best and most gain you’ll find in flow is in the bowl area and short side. After that, I’m sure you’ll find gains in flow but not a lot and I’ll call it not worth the pursuit. Once you go up into the port, it’s focusing on high lift/flow areas.

I’d bet even a set of new valves would be within the budget and really help a lot.

Food for thought? Yea?

Contact member PRH for a tip on this.

What do you have for an intake?
I’m trying to score a set of 915 heads which, is difficult to do here in CA. Ideally, I’ve got about $800 max to throw at the heads. New valves and maybe even valve seats would be priority if budget allowed.