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Author Topic:   Mopar Big Block
racerwilson
Dirt Freak

Total posts: 357
posted December 06, 2004 12:43 PM  
What is the best combo to build for a 1/2 mile dirt tri oval?

iowaracer6993
Dirt Full Roller

Total posts: 61
posted December 07, 2004 04:22 AM  
quote:
Originally posted by racerwilson:
What is the best combo to build for a 1/2 mile dirt tri oval?


iowaracer6993
Dirt Full Roller

Total posts: 61
posted December 07, 2004 04:22 AM  
quote:
Originally posted by racerwilson:
What is the best combo to build for a 1/2 mile dirt tri oval?


iowaracer6993
Dirt Full Roller

Total posts: 61
posted December 07, 2004 04:23 AM  
do u have any mopar small blocks looking what size of small blocks


quote:
Originally posted by racerwilson:
What is the best combo to build for a 1/2 mile dirt tri oval?


racerwilson
Dirt Freak

Total posts: 357
posted December 07, 2004 07:28 AM  
No small blocks. I do have a 400 block just need to know what I need to build it up.

mavrik82
Dirt Forum Racer

Total posts: 93
posted December 12, 2004 12:00 PM  
I'm putting one together now and there are many combos but the 451 is the most common and inexpensive. Grind a 440 crank to fit and you can use the 440 rods with easily available shorter pistons. The biggest HP gain in BB Mopars is in lightening their pistons, as they had the heaviest pistons ever built!!! Crower actually still sells a cam grind for oval track.
You can go bigger offset grinding crank and using BB Chevy rods(474) or using an aftermarket 4.15" stroker (498).Aviod boring that block over .030". If you need any info feel free to email me at mav82bb@aol.com.
I may also have some parts and pieces you could use, and definitely can give you more advice on some good combos. I may even have a set of GOOD heads. They are the small chamber 915's.Only used in 1967.They are pocket ported, oversized stainless valves and triple springs. I also have a set of 906's which are the larger chamber but were used on all the other HP mopars of the 60's. They need a total rebiuld, but are cheap.

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