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Don C, Funny thing on valve seals, I have been working on cars for 40 plus years and the only time I ever saw anyone drop a valve was a young guy using an air hold set and his quick connect failed. I have a air hold set as well as a leakdown tool but never use them for valve seals, would...

Animal Lawyer, First things first, what bellhousing and flywheel are you going to be using (so we know clutch diameter.

Millertime. looks like you have the Holley street dominator intake manifold with the smaller than 2Vintake ports. please advise us if you have any oil fouled spark plugs, just because the carb spray did not make an increase in idle speed does not mean it is not leaking (pulling in oil from...

Right on Bentworker, I have one in my toolbox with alligator clips for the wiring leads and a bunch of weld in bungs and plugs. this helps greatly when trying to tune someone else's car. The only issue I have is people want to see a specific A/F number at all times and carbs don't generally...

sorry Bentworker, Forgot which of the blocky you have in there now. I have always used primary jet for cruise A/F and power valve restriction for jetting when the power valve is open. you may want to get jetting a little more dialed in before swapping air bleeds. 

Bentworker, I would want to where my secondary throttle blades are at when you get that fat 70 mph highway cruise. And if my power valve is open or closed at 70 mph cruise.. if your power valve is still closed and secondarys  are still closed then smaller primary jet, if power valve is open...

is the ashtray in the ashtray holder ? that is what keeps pressure on the lid to keep it closed.

Dude, I am using the same water pump as you are, however I am using a WCCC #53234 restrictor plate that allows me to use a WINDSOR type thermostat ( 195degree) the WCCC #53234 restrictor uses a (tiny bleed hole) that is recessed a little bit that allows the use of the windsor tstat. I have...

Dude, what water pump pulley are you using ? C90Z- 8509- B is listed @ 6-61/64'' and is generally used on non ac cars. C90Z-8509- C is listed as 5-15/16'' and is used on ac cars, it will speed up your water pump. I was having the same issue as you described and swapping pulleys worked for...

Grego,  Don C brings up a very valid point (as always). Since this is a NEW build how we know  that your issue is not a base engine issue such as valve timing , lifter preload or distributor phasing ? Holley does state that one should get a good base tune before letting the sniper control...

Grego & 73'mach1,  closing throttle blades will raise iac numbers NOT lower them. After getting the iac where you want it and cycling the key to re zero tps one needs to make sure iac is repeatable, ask me how I know. Boilermaster

GREGO, iac around 20 warming up is meaningless, you need to know what it is fully warmed up in closed loop. AFR readings the same 12.5 would be not a good situation at idle or cruise, go back on in the wizard and see what your targets are. 12.5 is great for WOT but poor choices anywhere else...

Grego, Check your timimg with a timing light at idle and make sure it matches the parameters you setup in the wizard. what is your iac reading at idle with engine at operating temperature ? what are your idle and cruise settings in the wizard ? Do you get to closed loop? and are you seeing...

Bentworker,  3000 to 3400 all in is a pretty good standard and I would go with the bushing that allows the least mechanical (9 degrees dist. 18 @ crank. this will allow you some leeway to adjust base timing without overshooting total timing. You may be able to tolerate more total timing with...

73 mach1, lots of room for speculation here, for me its all about whos dyno, who is operating the dyno and how much loss from engine to tires.                                                                                                  I have a similar 408 with very similar camshaft but...

164 runner, I think you want C9OE 8509 F water pump pulley. Boilermaster

164 runner, you did not state if you have an ac car or not. ac cars and non ac cars use different diameter water pump pulleys and the ac pulley is smaller and turns faster. I had this same issue with my 408 C (429 radiator and shroud) went to the local pick and pull and got a pulley for an ac...

7173vert, once I get to zero lash (with positive stop) I will put my ratchet handle to a  clock position and then count how far it goes before the bolt starts reaching torque, (that will tell you how much preload you actually have.  If over 1 full turn, will usually add one of the little Crane...

KCmash, Sorry, I have been gone for quite some time. Just a little food for thought; before you had the primaries drilled , did you first try opening the secondary butterflys to achieve a proper idle ? That seems to be the standard procedure, perhaps the primaries are now at full bind CLOSED...

Cribbs 74, If you choose to install a T5, or any Tremec for that matter, make sure you dial indicate the the centerline of the crankshaft to the bell housing opening. I BELIEVE the spec is 0.005'' because the Tremecs use a tapered mainshaft front bearing. Clean both the engine to bell flange...