Budget Upgrades

BLACK FRIDAY SPECIAL. Thru 12/2 Everything (Including Calendars!!) in the shop is 20% off. use code BLACKFRIDAY24.
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It reads 14101081 and mannnnnn that thing is filled with carbon build up. I want to flushed it but I'm scared I'll start having leaks that the sludge was blocking.
 

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Could be a full swap of 305 TPI motor without the intake system as the manifolds are period correct for the 305 TPI. But could also be a mish mosh of parts. Putting small chamber 305 heads onto a 350 is a popular and cheap way to jack the compression to handle a bigger cam. The dilemma with the heads is the small valves needed to stay inside the 305 bore. They limit the top end capabilities. But for a specific application with the correct cam for low end grunt the head swap can work out well and be on a budget.

In terms of what you should do, pull a head and verify of it's a 305. If it is, then understand the limits of a NA 305. Regarding the amount of sludge under the valve cover, it indicates not enough oil changes, using crap oil, running hotter oil temps than recommended or a combination of those 3. Either way it isn't a good situation. I'd recommend a regroup on your build plan and intended use.
 
In terms of what you should do, pull a head and verify of it's a 305. If it is, then understand the limits of a NA 305. Regarding the amount of sludge under the valve cover, it indicates not enough oil changes, using crap oil, running hotter oil temps than recommended or a combination of those 3. Either way it isn't a good situation. I'd recommend a regroup on your build plan and intended use.

The block casting # will tell you what it is - agree it's pretty nasty, I have seen worse.
 
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BLACK FRIDAY SPECIAL. Thru 12/2 Everything (Including Calendars!!) in the shop is 20% off. use code BLACKFRIDAY24.

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