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Today I installed the 17 degree advance bushing and set initial timing to 20 degrees. With vac advance connected I am getting around 32 degrees at idle, which is a big increase over the 15 I was running previously. MSD doesn’t seem to have an adjustable vacuum advance option for this...

From a cold start it warms up pretty quickly, and once warm, if left idling or in stop/go traffic it will get to the fan trigger temp (195) rather quickly. The fan moves enough air to bring it back down, but when it's hot outside the fan is running almost constantly. The top rad hose/fill cap...

Thanks, everyone, for the pointers. I've learned a lot in this discussion. I currently have an MSD Pro Billet 8387 and according to the documentation (https://documents.holley.com/8387.pdf) it can do 10 degrees of vacuum advance at 15 in of vacuum, so best case I'm looking at 8-9 degrees at...

Ok, Here's what I have done so far (Vacuum advance is not connected): 1) Cleaned and reinstalled the plugs 2) Removed carb, gaskets look good, verified jets, rods and springs. Everything appears as stock. Idle speed screw was all the way in (fast). Idle enrichment screws were 1.5 turns out...

Gotcha, thanks. Will pull carb first, check the idle settings and get a peek at the jets. Will also look for any oil in the intake. @Geoff 2 I want to make sure I understand your comments about timing (I'm a noob). Timing is currently set at 15 degrees initial with 35 total. It sounds like...

Thanks all, for the pointers. The car ran for 300-400 miles with the higher fuel pressure. It does have a pretty aggressive cam: 241/247 @ 0.050, 0.545 lift and 110 LSA. As a result, idle is not very smooth, but I have it set to around 800-850. Trips are most commonly 15-30 miles one way...

A bit of background to start: 440, .030 over, 10.5:1 compression 440 source aluminum heads. Performer RPM intake, Edelbrock 1413 (800 cfm, mechanical secondaries, e-choke), spark plugs are NGK BKR5E and probably have < 600 miles on them. I haven't touched the carb since I got the car, so I...

Took longer than I expected, but I have had the new pump in for the last week and a half and the drainback issue is hugely improved. It doesn't kick over on the first crank when warm or when it's been sitting, so I'm sure there's some evaporation happening, but I no longer have the 20+ seconds...

If it takes 30 seconds or more to get fuel to the carb it is probably due to a problem with the pump. Either bad check valve or pump diaphragm allowing it to drain back. I had this problem before adding a fuel pressure regulator. Many seconds of cranking before firing if it had been sitting...

These guys are great too: https://www.thecarburetorshopus.com/

Most of the aftermarket kits seem to prefer the 4.9 over the 4.2. I got an AEM dual unit. Nice piece but way overkill for my needs.