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It's been a over a week now but I'm pretty sure that at an open height of 1.233", there was .020" clearance between all the coils. According to the Haynes book I've referenced you need at least .010" between coils. So the stock 318 springs should be good for .454" lift, maybe even a little...

I don't remember exactly but I'm almost certain I only compressed it fully, long enough to measure it with a vernier caliper. I think I did it twice to double check. Thanks to all of you guys for the responses.

Has anyone ever broke a stock 318 valve spring? I compressed one to solid height to calculate the max lift for that particular spring. Since then I've assembled the heads. The mopar performance book says to never use any spring which has been compressed to solid height in an engine. Dad says it...

Okay so Fel Pro Blue are a good gasket then?

So they both seal equally well? Should I use some copper spray seal by Permatex or no?

Just a 318 for my Duster. Mild cam, 4bbl, 9:1 compression.

Which Fel-Pro head gasket would you guys recommend based on experience? I'm trying to decide between FP 521SD and 8553PT.

I've heard of people needing to clearance valve covers so they will fit with an aftermarket intake. Do I need to enlarge the notches in OEM stamped steel valve covers so that they will fit with an Edelbrock Performer 318/360 intake manifold?

I'd like to avoid modifying new rockers to ensure they clear the valve springs, I've read that Indy heads does this by running big block rockers on their heads. Will the big block rockers fit the small block shaft? Can you make them work on W-2s?

I'm going to run a 392 Hemi magneto with the small block gear pressed onto the shaft. I'm running a dry sump so the longer shaft of the 392 hemi will hopefully be long enough that it will sit inside the bushing and I can then avoid running an intermediate shaft.

Do small blocks, poly 318s, 392 hemis, and 426 hemis have the same diameter distributor holes? Also, does anybody know the different shaft lengths and gear sizes?

According to what I've seen they only flow about 250cfm though? :/ Is that correct?

and it will save me $800 at least

:( That sucks.. I found a good deal on a set of W-2s that might be perfect for this sprint car build. Unfortunately I'm running a Chevy injection manifold that I'll be adapting to fit. Do you think I'd be able to make it work with adapters? What do you guys think? Otherwise I'm going to end...

If you ignore the difference in bolt holes and the difference in flange angle, can you make a standard intake fit W-2 heads so the ports match?

I'm curious as to why the Moroso Dry sump steel oil pan has fewer bolt holes than the block is drilled and tapped for.

I'm looking for some representation for how well the Procomp/Speedmaster Heads for small block Mopars flow, I haven't been able to find any technical data on them. Has anyone had any issues with the actual casting of the heads? What is the most power have you guys made with them? Also, what...

straights are short and narrow, turns are wide and banked. And wow thanks for that info, that's a really interesting concept.

I can run untouched Brodix B1BA heads with a 1 inch long 2 3/16" restrictor in each stack, or open heads with valve angle within 1* of stock and a 3 inch long 1 7/8" restrictor in each stack. So yes, as long as they aren't Brodix B1BA heads, and have nearly the same valve angle as stock you can...

The other thing to consider is that when choosing the open head route you have to run 1 inch long 1 7/8" restrictors in the velocity stacks. When running the B1BA's you only have to run 2 or 3" long 2 3/16" restrictors. Aren't the W-5s prone to cracking? Or is that a different head?

As far as heads, stock Eddies won't do much. The only choices are Indy Heads, CNC ported Eddies from Hughes, Pro Comp (IDK how much power they make), W2s, Brodix B1BAs, and anything else that has the stock valve angle approximately. I really need aluminum heads for the lower center of gravity...

A engine from one of the best builders will run a guy about $35k probably, a few guys have those engines. I'm not sure how much of that is labor but you can eliminate that cost from my build. The Dodge will definitely be more expensive, but still; I'd rather run a near up to par Mopar than the...

Okay, here's the deal. I've wanted to race sprint cars for many years now. I was only able to do so about 2 years ago, but a lot was different then in my life. So there are many different answers, I'm in no way expecting this to be easy; it's going to take a lot of hard work but it's what I...

As far as the crank goes; if I can't use the one I have and nobody has a good forged one they'll sell to me fairly cheap, I'll probably just buy a billet crank out of a NASCAR R3 along with the matching connecting rods and call it a day. That would be the most economical way to go if I have to...

Thank you Yellow Rose :D Now that's information I can work with :burnout: What you're saying about power under the curve (which is what really matters) makes complete sense and I can see where my numbers may be misleading me. People have so many claims without any supporting theories and or...

Okay, you seem to think it's much more simple than it actually is. A 4.00 bore does not automatically equal a podium finish, a 3.91" bore does not automatically equal a last place finish. The block I have is bored .030 over already, I'm planning on boring it another .010. That means 328.5...

I'm lucky to have a friend who has CNC machines, and another who owns an engine shop. So I don't have to worry about those costs thankfully. I'm going to have to get custom pistons either way; Wiseco asked for my formal proposal so I'm going to send them that this weekend. My buddy with the...

Thanks for the valuable insight. I really appreciate it and I will take that into consideration. Does anyone have any used aluminum cylinder heads they'd be willing to see for a decent price?

Some guys say 600, some guys say 700, some say 750 hp. Obviously I need to make as much as I can with what I'm able to get.

For those of you who would like to continue to discuss more than just the valve shrouding; I started a thread for those who want to support me in building this sprint car. http://www.forabodiesonly.com/mopar/showthread.php?t=343040