781 bbc heads from auto?
08-01-2014, 08:02 PM
#13
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There was a $2900 502 for sale this week. Prosystems carb and such.
Too bad.
Too bad.
08-01-2014, 08:12 PM
#14
Current casting # 360 peanut heads not looking very useable trashed out and tired. Bottom redone 2 yrs ago. I am freshening-up the stock engine not buying any real performance parts, read alum heads, just putting the boat to good running order for 1-2 years.
I saw the 502 and the 509 and would like to have but i need to swap the alpha for bravo before adding any "real" power.
I found some recent rebuilt 781's for $250 my head shop said they would replace valves with stainless 2.25/1.88 and cc and machine heads for compression correction for around $400. I thought this to be a prudent direction.
Am i missing something? I am asking 'cause i really am no expert at this.
Thanks and as always any all sugestions welcome.
I saw the 502 and the 509 and would like to have but i need to swap the alpha for bravo before adding any "real" power.
I found some recent rebuilt 781's for $250 my head shop said they would replace valves with stainless 2.25/1.88 and cc and machine heads for compression correction for around $400. I thought this to be a prudent direction.
Am i missing something? I am asking 'cause i really am no expert at this.
Thanks and as always any all sugestions welcome.
08-01-2014, 08:23 PM
#15
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Those 781's will blow your 360'sw out of the water and with a tad of machining they will hit your comp ratio. Do an RPM Airgap intake and go have fun. This will really wake up your engine.
08-02-2014, 02:35 PM
#18
If you cut the heads enough to raise the compression you will most likely have to cut the intake to match. The 2.25 valves may be a waste on that small bore motor and just cost you some low end torque. You might be better off with some closed chamber heads with 110 cc combustion chambers.
08-02-2014, 03:52 PM
#19
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We are running the 781 heads on a 461 BBC in an all steel Chevelle and the engine is a monster! It pulls like a freight train in the eighth and will be in the 6's with some tuning....all steel and full interior I might add.
781 heads are great, with a bit of work done to em.
781 heads are great, with a bit of work done to em.
