We are using the 557 400 and 810 350 later blocks in the dirt car. Both have dowels. No problems yet/knock,knock��. Main reason is the weight savings off the front of the car. Spin 6200. I plan on doing some dyno testing to see where we’re at on hp. Class is limited to a 4412 2 barrel Holley carb.
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1963 Cat SD Clone (old school) streeter
1964 GTO post coupe, tripower, 4speed (build)
1965 GTO 389 tripower, 4 speed, driver
1966 GTO dragcar
1966 GTO Tri power, 4speed, barn find
1966 GTO Ragtop
1969 GTO Judge RA lll, auto
1970 GP SSJ
1970 GTO barn find..TLB…390 horse?….yeh, 390
1973 Grand Safari wagon, 700hp stoplight sleeper
525ci DCI & 609ci LM V head builds
Factory stock oval track car
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