Gotta be 413

[momo61]

Looking to take on one last restoration project with my father and probably will be our last considering the years we both have logged! Have a lead on a 64 chrysler 300 w no engine. Want to put a 413 back into it. Thinking just a wedge, not max wedge, for a replacement. Have an early 70's motor home 413 in the barn and want to use that block. Plan is to use 906 heads, 268/284 purple cam, forged cranck from a 440 and an in line dual quad intake.Is all this a viable replacement performance wise to the original 413? Do have concerns on intake after seeing a thread somewhere on it flow characteristics especially seeing it dyno''ed against a six pack intake. Want to squeeze every course out of this 413. Recommendations?

 

[RemCharger]

Don't waste your time with the small bore block. If you're serious about trying to get performance
Just go 440, say it's a 413. Done

 

[CBODY67]

I would use the closed chamber heads. The open chambers flow the same, but lack the squish of the closed chamber heads for best fuel use. Do put the 1.74" exhaust valves in them, though. The closer to 4.0" bore, the better the combustion dynamics, too. Find some lighter-weight pistons and wrist pins. Instant power. Then add some "mm" rings for more power from less internal friction. More instant power. The 413 should already have the steel crank in it. Closed chamber 1.74" exhaust valve heads were on the '67 TX 440s, one year only, from the factory.

If you decide to use a 440, same recommendations as above. Might be easier to find the "mm" piston/ring sets for it.

A big consideration can be the exhaust manifolding. On the '62's with the upswept factory hot rod exhaust manifolds, they hit the power brake booster, so no power brakes on cars with those manifolds.

Did the '64 413s have 4-bolt valve covers? Or had they already changed to 6-bolt covers?

Y'all have fun!
CBODY67

 

[UGW]

Did the '64 413s have 4-bolt valve covers? Or had they already changed to 6-bolt covers?

The switch to 6-bolt happened in late 62/early 63. I was very confused when I did the gaskets on my 63, and discovered that I have 4 bolt covers, but the heads have holes for 6 studs. Everything is original to my knowledge, so I went digging, and found a service bulletin from early 1963 about the switch. Apparently they were using up the old valve covers. Torky decoded my trim tag, and my car was built around January 63, so everything lines up.